What are people's thoughts on printing a marker out of resin? Some of these machines can print to tolerances of 0.0011 inches - something like 0.02mm I think. That seems like a small enough tolerance for manufacture - at least small enough so that it can be compensated by with O-rings. Reasons behind asking is that when I've been bored I've designed a couple of markers & bolt systems. Since I don't have any metal working tools (Would need at least a lathe and a 3 axis CNC milling machine, along with a few thousand quid), and I've made a couple of gearboxes via 3D printing before, it seems like a more cost effective method of making a complex shape (i.e a marker or a bolt system). Thoughts? Or am I just crazy?