Quantta did produce Tru axle version of hub but finding them can be difficult. However if u have a lathe machine or anyone can make yourself the converting cap to fit the hub..
Hi, sorry, I wasnt so sure with the xd or ms adapter, havent look for 1 yet, meybe they do made those version. However, tons of sunshine n sunrace n also some other third party do made alot of cheap quite good cassette for normal hub.
so far all mtb hub included the low price cheap hub can install 12s caset,( not xd or microspline type). quanta hub are also same design as all mtb hub only with wider body. I believe no problem for 12s.
HI, as lite as u can get would be best for low resistance and faster speed. depend on the area and wheather where u live. some country muddy could be over acidic, then u need very high rust resist and thicker posible for maximum protetion over the bearing, unlees bearing is no isue for u n u can change the bearing easily. avoid red or blue color grease, not suitable for bearing bike.white or lithium grease not doing good in acidic muddy area. check those reknown brand, they have wide range of all grease application.
not that i know, so far I havent see quanta with xd drive. maybe they have I not sure. by the way, u dont need xd to go 12s, nows day all cassette with standard free hub come in 12s.