just the feedback I needed - thanks for you full and useful comments
14s7 = 90Kg
I'll let you know how I get on:
My other options:
Inter 17 (SPI) -- inter 17R not available in UK (ie can't get larger carbon rig )
Stealth (not sure about unusual rudders - Stealth marine say they may help in a short chop)
Spitfire
Good ol' Dart 18
Hope to trial Inter17 and Stealth over easter at weston (Southampton).
Who imports Ti-pan into UK?
Could I still take my 12 year old out in F4 on a F16 (stealth or Spitfire) for a pleasure sail?
Huw