# Header holes on PIM447 Trackball Breakout slightly staggered? **URL:** \ **Category:** Support\ **Created:** [July 22, 2023, 5:26pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563 "2023-07-22T17:26:07Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Fixizin](https://avatars.discourse-cdn.com/v4/letter/f/53a042/32.png) [@Fixizin](https://forums.pimoroni.com/u/Fixizin)\ **Post date:** [July 22, 2023, 5:26pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/1 "2023-07-22T17:26:07Z")
Going by user photos, the offsets are not enough to prevent soldering a 5-pin header in place, but curious why the holes are NOT in perfect alignment, but instead slightly “sawtoothed”? Pins 2 & 4 (SDA & INT) are noticeably farther from the edge than the other 3 pins. ---
**Author:** ![Shoe](https://avatars.discourse-cdn.com/v4/letter/s/e36b37/32.png) [@Shoe](https://forums.pimoroni.com/u/Shoe)\ **Post date:** [July 22, 2023, 7:08pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/2 "2023-07-22T19:08:27Z")
It means they’re _slightly_ press-fit. Not enough to avoid soldering altogether, but as a short temporary thing it can work, and it can also make soldering easier as the pins hold themselves in the header while you do it. There are a few different Pimoroni products with that kind of staggering. ---
**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\ **Post date:** [July 22, 2023, 8:11pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/3 "2023-07-22T20:11:49Z")
What he said, makes soldering easier as it stays in place. ---
**Author:** ![Fixizin](https://avatars.discourse-cdn.com/v4/letter/f/53a042/32.png) [@Fixizin](https://forums.pimoroni.com/u/Fixizin)\ **Post date:** [July 22, 2023, 9:45pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/4 "2023-07-22T21:45:42Z")
OK, thanks… never had an issue with that, but it makes sense. Might end up plugging this trackball right onto the back of my Pi 400, since the pinout matches GPIO 1-3-5-7-9… ---
**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\ **Post date:** [July 23, 2023, 9:56am UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/5 "2023-07-23T09:56:59Z")
I have one on my Pi 400. I have a Pi 400 Flat Hat hacker Plugged in. The Trackball is on a Proto Zero that plugs into the Hat. I put an RV3028 beside the trackball, I had room so why not. I dig my camera out and post a picture latter on. ---
**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\ **Post date:** [July 24, 2023, 12:03pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/6 "2023-07-24T12:03:03Z")
This is what i ended up with mounting my trackball. Looks like I need to get the vacuum out and clean up some cat hair. ![DSCF5968](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/7/7cf62be71960d9f4d3f3cd54991319f8ff383a9c.jpeg) ![DSCF5973](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/3/3a04dc9a96a691cac1fafed2531195a183710e53.jpeg) ---
**Author:** ![bablokb](https://avatars.discourse-cdn.com/v4/letter/b/ee59a6/32.png) [@bablokb](https://forums.pimoroni.com/u/bablokb)\ **Post date:** [July 24, 2023, 4:25pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/7 "2023-07-24T16:25:26Z")
This pin alignment (or better misalignment) is the breakout-garden magic. I was actually searching on Pimoroni’s site for an exact spec, but did not find anything. I wanted to use it for some of my own PCBs. I ended up needing three tries until I managed to get the offsets right. ---
**Author:** ![Shoe](https://avatars.discourse-cdn.com/v4/letter/s/e36b37/32.png) [@Shoe](https://forums.pimoroni.com/u/Shoe)\ **Post date:** [July 24, 2023, 7:56pm UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/8 "2023-07-24T19:56:14Z")
Ooh, any chance you could share? Pimoroni don’t usually release PCB designs so I imagine releasing the staggering design didn’t occur to them. ---
**Author:** ![bablokb](https://avatars.discourse-cdn.com/v4/letter/b/ee59a6/32.png) [@bablokb](https://forums.pimoroni.com/u/bablokb)\ **Post date:** [July 25, 2023, 10:41am UTC](https://forums.pimoroni.com/t/header-holes-on-pim447-trackball-breakout-slightly-staggered/22563/9 "2023-07-25T10:41:50Z")
Here are three PCBs I made: - [GitHub - bablokb/pcb-pico-i2c: An I2C-connector shim for the Raspberrry Pi Pico](https://github.com/bablokb/pcb-pico-i2c) - [GitHub - bablokb/pcb-pico-pcf8563: A small pcb for the PCF8563 RTC optimized for the Raspberry Pi Pico](https://github.com/bablokb/pcb-pico-pcf8563) - [GitHub - bablokb/pcb-pico-en-control: Suport PCB to control the enable pin of a Raspberry Pi Pico](https://github.com/bablokb/pcb-pico-en-control) The first one is a small PCB that adds an I2C connector. The second one is a RTC+I2C connector. The third is a power-control PCB. You can plug the latter two underneath the pico.