styles of torque wrenches for reference:
most recommend you use this during install:
install correctly and your spacers should be GTG. Be warned that some tire shops will not mount new tires if you're running these even if they are
hub-centric which cheap knock-offs may not be.
Start calling them 'hub adapters' is a good way to ease their concerns but you have
to check them often to make it good habit of spotting issues before they become serious. I've run mine for 2+ years with no problems but I don't go wheelin too often. Someone with more experience off-roading with these may chime in.