I had some trouble with the boolean modifier. If I positioned my notch at certain places, the modifier didn’t seem to cut out my notch. I googled a bit and found this: https://blender.stackexchange.com/questions/7480/why-doesnt-the-boolean-modifier-work-for-me
I didn’t try the solution suggested in the post. Instead I just moved my notch until the modifier worked. Are there some tips for using the boolean modifier to avoid this problem?