I'd say .05 mm : )
I use Precise white .65. It’s alright. Close to TBG. I’m going to try .60 next. Anything thicker would be too much power for what I need.
@Devils son in law Small is good it's not how big it's how you use it.
@babycow Its good to find a comfort zone I've just found the urge to explore
I just purchased some 'Precise' for the first time, in .075, but haven't tried it yet. Will report back when I have some results.