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thats great, joelizenson encountered problems on printing the valve cylinders & buttons. could you check them before printing? I need to know what is wrong to fix it. anyway I've made a new set of valves with buttons separate from the valve bodies. I can upload it if you need. If you can print the one piece version then it is better. the new version requires gluing. The tolerances between valves and the inside wall of the valve block are real trumpet tolerances; around 0.1mm. It is more than tight for a 3d printer. I can also shave the valves a bit from sides if you like.