I have a tutorial on the Saturday in Ipswich and I'm not sure about the Sunday, despite wonderful offers of a lift.....
I'd LOVE to hear Ditton 66's again though. I adored them at the time and remember doing up some of the replacements 662 and also some 552's from memory - we took the last two super-tweeters that Celestion had for them. A wonderful bridge between older beef boxes and modern squeakers. SOME Celestions from more modern production are really good too - DL8's and the A series from memory 
Marco, please don't go for deafening levels with the 66's. They were designed for quality domestic use, rather than PA levels and you'll have a major problem if any old drivers get fatigued, as well they might...
I can't go on and I can't go back, I don't feel so matter of fact,
I tried and tried to make good sense, What's the good to try it all again?