Thank you all for your replies and advices. I will try to sort out the tilt soon (hopefully).
I would like to use the telescope with the reducer at f/4.5 for narrowband, and perhaps with the flattener at f/6 for some galaxy chasing one day.
Added a bit of data to the chicken (4hrs 15min in total). It is still undercooked but hopefully will turn out alright when I get enough data. Dozen of flats, bias and a stretch were applied.
http://www.astrobin.com/full/291983/B/?nc=user
It is soooo good to be imaging again!
Suavi
EDIT: Sorry, forgot to answer your question Greg. Yes, it is QSI 690. Wouldn't swap if for anything at this stage, maybe with the exception of FLI 16200...
EDIT #2: Just read interesting impressions from a user of a smaller brother of my CFF105mm - looks like CFF is really crafting nice telescopes:
https://www.cloudynights.com/topic/5...-f6/?p=7828234