So, it turns out that yes, I am an idiot.
I was getting frustrated with the length of time it was taking to print OpenLock stuff and then the extended time cleaning it. So, just out of bloody minded annoyance I tried printing in on my FDM without supports. Well, colour me surprised when it printed just fine. So, erm…. Huh? Mostly this stuff has it’s own pillar supports in the lock holes, not all of it, but mostly. Those that don’t still print but with a little bit of a mess in the lock cavity. A couple minutes with a diamond file and it’s clean and clear, and print times are easily 50% less.
What a muppet.
I suppose if I had bothered to hunt the internet for information on OpenLock I would have discovered this earlier, but I didn’t.
Is this a lesson in look first? Or think first? Whatever, happy now, and rooting around on my Terrain drive to find all those things I wanted to print but didn’t.