Jonokuchi tube amp test case

This is the first thing i have made on F360 so be gentle. this is vs .001 just looking for fitment; strength. Suggestions/"your a dummy do this" very welcomed since I am just starting out to tinker with any 3D program. Some sort of device to cover the bottom and add some feet will be invented at some point… Should be very close to schematics in the PDF that comes with the build. M3 is size for the inserts This is the link to the project page:http://www.pmillett.com/Jonokuchi.htm