I have been looking for a 4" refractor in the £2k-£3k price range to give me more reach and greater resolution than my excellent Esprit 80.
My conclusion after three full days of analysis is that the GT 102 should do what I need.
I'm thinking or getting both the 68III flattener and Flat 7a 0.8 reducer.
Also, has anyone any experience of using the William Optics Flattener 68III with the GT102. As far as I can see the flattener was specifically made for the FLT132 but is also shown as useable on the GT102 - just wondered if it is ok not being specifically made for it?