Here's a nifty little tool I made to allow you to discover how big a hole you need to make in your 3D Printed parts. It contains one plate and one 5mm diameter peg. If you put the peg in the holes, the one that fits will tell you how big that hole should actually be to fit the printed peg. Comes in real handy for making either tight fitting parts or parts that will slide into each other to know how much of a difference the size really is. For me, the part hole should be +.3mm for a piece to fit properly. Give it a try and lemme know what you think!