Ha ha, thanks for the compliment and don't be offended because I wasn't taking a shot at anyone in particular mate, but the F2/3 is very much under-rated, due to the (relatively minor) problems associated with the engines revised head/cam, but these things are now easily fixed, due to the input from APE/Cyclex etc.
When F2 parts were hard to obtain I converted mine to run a K6 top end, but in time I'll recondition the head, (or get one of APE's, more likely) install an 836cc kit and a better cam (probably a mild Megacycle) and along with the F2's excellent brakes and handling, it should be good for many years to come. Aesthetically, they are a sportier look than a "K", and don't really need as much modification to make them look like a racer. Cheers, Terry.