If it is the vendor I think you are talking about I wouldn't believe a word that is said or for that matter, any advice given, believe me, I know from personal experience as perhaps many others do. How's this : placed a wanted ad on IIS some time back for a Tak LE 10mm EP, got a terse reply from the said vendor stating that "Takahashi have never or will not make an LE-10mm EP ", emailed back links to a number of sites showing images of the eyepiece. Needless to say I never received a reply. I could go on however ...........
Regarding the FSQ-106ED & FSQ-106EDXIII, the former has the capstan wheel fitted and the latter has the CAA fitted and no capstan wheel. Both configurations are the same price, at least at AEC. The ED is regarded as a visual scope and EDXIII version for imaging. I bought the ED model from Claude and I subsequently bought the CAA and adaptor to have the best of both worlds and most particularly I liked the "Captains" wheel.
FSQ-100, no such animal !, I think