I believe that the 101is can handle a 16803 as long as a field flattener is used. I bought all the requisite gear from Bintel a while back, but haven't had a chance to set it up. I did use the 101is with my qsi 540 for a while before getting my PlaneWave. It gave pretty good images.
https://www.astrobin.com/full/54280/0/
I also used a William Optics ZS110 for a long while, but even with the 15mm x 15mm QSI chip, there was still noticiable field curvature.
Geoff