Hi Taff,
I'm still on my Jimmy Buttons with high rise mount. Works for me. We had another suspension workshop at home last weekend. I've described these before, but very briefly I get one of, if not THE pre-emminent suspension tuners in Oz, Fran Pons, down to my place in the bush for 3 days of valving, servicing, setup and some coaching.
One of the guys on a 525 was very sensitive to bar position. His lap times were effected by 1-2 secs in a 40 sec lap by rotating the bars from his optium as little as 10 mm back or forward. It meant his seating position was moving in response and effecting the weighting of the front. Very interesting.
Interestingly, Frank has determined that the 06 PDS shocks on the KTMs don't need revalving. He just re-tapers the needle. His son Trent is a top OZ MXer who due to his suspension setup can now lap faster than the Importer, 'works' team rider, Ryan Marmont, in testing. When swapping bikes, the times are more than reversed though. Not sure yet of the Berg applicability as he hasn't done an 06 yet.
Bottom line, play with bars against the stop watch and have someone assisting who knows what to look for.
Cheers
Steve