I did edit with a touchscreen Ampex ACE and it worked. I preferred the keyboard version or a 9100 editor altogether but it worked, and really well when hooking VPR 3s and Ampex switcher to it. The integration was only second to the Sony range.
As for Quantel’s interface it is very fast for quick assembly editing (like news), but a bit of a pain when it comes to trimming, splitting edits and so on, at least on the Editbox it was.
Patrice