Easy to print, easy to mountprinted in 4 parts with pla filamentlooks very sensitive and strong toojust needs a little sanding to make the cylinder smooth insidevideo here https://youtu.be/nUxBxbF-HGE
needs 2 magnets (8mm) per cylinderhttps://www.amazon.fr/dp/B07JHQNDZC/ref=pe_3044141_189395771_TE_dp_1also need a 2mm shaft to make the pistoncut 21mm of that shafthttps://fr.aliexpress.com/item/4000471083971.html?spm=a2g0s.12269583.0.0.53293ad4oUaikG