How to change 1.5u thumb keys to 1u?

[Ingvix]

I've been making some changes for my own build without any previous experience with clojure. I'd just like to ask how would I succesfully change the 1.5u thumb keys to 1u so that the case also realizes this? I've moved the top keys from thumb-15x-layout to thumb-1x-layout and removed the former altogether from the code. That alone clearly isn't enough and I'm in a point where I now got only the gaps left between the top thumb key holes and the case. I can't seem to figure out how would I go about closing the gaps, so help would be appreciated.