One of my favorite gifts I got as a kid was leather crafting kits . I ' d recommend the baseball or wallet kit from Tandy Leather . kitwalletkit <| sep |> I was actually looking at the full Hshaped CoreXY circuit there is no slack with that belt layout , you ' d just add a 3 rd belt path running across all the existing idlers . One problem is that the extruder requires a continuous belt , unlike X and Y you ' d need a hefty ~ 3 m continuous GT 2 belt , since assuming the printer is square , it needs to be 6 x the length of the sides . Honestly , it ' s probably more complicated than making a servo extruder . <| sep |> This is awesome . It upsets me though that he is most fond of the worst game in the series <| sep |> Buy now , pay later eh ? Still worth it .