I believe some guitar parts in many queen songs are played wrong and also some parts shown don't even seem to exist in the actual song.I've always wanted full tabs for TMOTBQ and My fairy king .
Yes to basix4, best Queen related guitar stuff on the inter webs by miles.
Songsterr is a bit dodgy, I have paid membership on Tab Pro at plus.ultimate-guitar.com and find that their software and quality of tabs is much better that Songsterr.