how viscous the stuff dripping from your condenser is, depends on where you have your condenser set. (so what temp are you running your condenser?)
you’re not getting mains (nor manes) at 140C if you’ve got a vac leak. I’m not certain you can achieve mains at 140C even with 10-2 microns, and you’re probably well above 100microns.
if you’re getting “thick” at 140C and 200micron I’m betting you’re running a chiller on your condenser and are at 10C rather than 95-130C.
start with: I make terrible distillate....why?