Large tray for the multiboard I like to, Keep it simple... I like to have a pegboard system to hold random bits n stuff.
I made large, Medium and Small trays. I like the multiboard system. Super versatile and secure!

This tray is about 220mm x 110mm x 60mm

I used 3 x 13 mm Small Thread, Flat Head, Bolt to secure https://than.gs/m/974055

Update:I noticed a couple of my bolts broke off at the head part. Print the bolts at 100% infill. Looking into it "Keep Making" designer recommends the stronger 13 mm Small Thread, Flat Head, T-Bolt. If you need a stronger bolt! https://than.gs/m/974236

Have fun with the colour of the bolts :)