Thats interesting. I had forgotten the TS scopes. Happily you and someone else have reminded me. I’ve no idea what the quality is like so I shall look into that as I had assumed (erroneously) that they were daft expensive.
I have wondered about the 300PDS from Skywatcher. The focuser is a bit heavy (I used a 130mm version a few years ago) as I recall but given I only have a 2.1m dome to work with, that may work in my favour in countering the mirror weight… The Quattro isn’t bad in that respect.
The PowerNewts are worth knowing about – I imagine collimation could be fun. Thanks