It doesn’t make sense to put a hole in the top of the case for GPIO access- it’s just way too deep for pushing on jump wires, and really awkward for routing out a ribbon cable. If you remove a couple of layers and use a Coupé lid, then you basically have a Coupé which might suit you fine- I think we’re looking into selling those separately, so you could “convert” your PiBow into a Coupé when you need to, and use as many or as few layers as you like.
A top with the GPIO slot, but without the USB routing is unlikely- I just don’t think enough people would want it!
The 6th layer is just at the right level to really cleanly route out a ribbon cable, it’s not all that hard to modify and I have a guide for how to do so in the works.
This picture shows my PiBow, which I modified on Friday to verify my instructions weren’t just insane ramblings. You wouldn’t know it wasn’t made that way.
This shows where I marked and scored the layer with a knife. This makes for a cleaner and more accurate cut- if you use some of our cutting pliers then always make sure the flat side of the pliers is on the edge you’re keeping and the angled side is facing towards the piece you’re going to throw away.
The piece that routes around the USB port is only secured by one screw, but since it’s routed so tightly around the ports it doesn’t wiggle around or look messy.