I want to sand down a specific part on the casing by 9mm. It is a 8mm pipe that lies underneath the cartridge cutout. Figure 1 has the area I want to sand down highlighted. Last year we were allowed to modify cartridges and the motor cap, in this post and this post. The piece that I want to modify is in that same region as the previous posts. The problem is that R21 states "No modifications to electronic components are allowed.", the latter posts were granted the exception from this ruling.
My argument is that the pipe is obviously not a electronic part, and my motor casing would be just as structurally secure without the pipe. It's also in the same region as the other exceptions, and that the modification wouldn't be able to give someone any advantage over any other person. The only benefit this brings me, is having the motor be a slimmer fit and the ability to decrease the length.
If I were to guess the purpose of the pipe, I would guess that it is to provide extra room for long screws.
Thank you.
Figure 1.
