Yeah as with most chip's/boards you can cap the bps but it's the ramp kick-in that needs to be adjusted, can't remember what 'this years' millenium rule is but pretty sure it's 2/3 safety then ramping..
Best bet is to contact Ash at Dye and he can advise you
yeah if it a spitfire you can adjust the true semi count before the ramp kicks in, my bro had one on his shocker and was easily set up to the 08/09 millennium rules
If you want to try out the board then find out how much a new one is from dye and you can have this one half price + postage.
If it doesn't fit or doesn't have the right modes then simply post it back and I'll refund you the money.
All it will cost you to try it is the postage to you and back. which will be a couple of quid each way.