Thanks guys, especially Ken - I remember those threads now.
Well the Board of Astronomical Appropriations conceded to my request as my Christmas present, so once 25 Dec gets around, I'll have the AccuFocus! Shame - I could have really used one last night, and here it was sitting in a box at home waiting for wrapping!
Probably won't get approval for any form of Crayford for some time, so will just have to cope until then. May take a Lotto win to justify the EV1nm from JMI, but after trying one of their focusers last night on a friend's scope, I am now more eager than ever.