Skywriter (Fullsize) unresponsive

I’ve just installed full size Skywriter on my Pi4B and it has clearly installed and is connected OK as running the test program I get some taps / touches / airwheels. However, it is highly erratic - only registers one in 4 or 5 swipes, records tap as central most of the time even if at extremes, misses a lot of gestures entirely. I updated the firmware (correct version for fullsize) and it is still the same. Am I missing something?

Touch and held my finger at bottom edge and get:

Hello I’m a novice Pi guy, I dont have any fix for u ,just my own experience with the hat, i own a skywriter hat ,bought it a few yrs ago now ,and it was always erratic,I never did find any reason