Hey man great model and it works nicely! I have struggled with punching a 38mm hole, I used a wood circular saw that ended up cracking the container a bit around the opening. I thought of using a flat drill bit instead that works better with cutting plastics, however I couldn't find a 38mm option, the closest I could find is 40mm. Is there any chance you could make an option that fits the 40mm saw (including the TPU plug)?