I just tried running these off on my printer and the file actually has a minor error, nothing that can't be fixed or anything (though my cad programs are fighting me on it). Then I had a knot in my spool (it happens)...Anyhow, while I could probably get these to print just fine but they are a bit fragile and not really designed for typical FDM printers (what most home users have) or even the more rare SLA (resin) and in the time since this thread, other designs made specifically for FDM printers have sprung up. For the price of a single one, shipped from Shapeways in plastic, you could just about get a whole tray printed from someone local in just two days (check 3dhubs.com). Find your part on Thingiverse and upload it at 3d hubs and it will give you various locals, their abilities and their prices.Switch holdersEdit:I just realized these open the switch at the same time, so not quite the same.