Yes you cant go wrong with either modded versions. Also you should get a venturi set. I in my D8 with my PTM 5 port will be starting with a 6.5mm insert which is the smallest availible from GO. And there are companies that make smaller ones if needed. That will tame the mill, smooth it out, and give more runtime. I am guessing I should get 10mins at least out of mine. And if I need to go to a smaller insert 5.5 or 6mm will give even more runtime. I myself been wanting to try a MM engine but my sponsorship is in the US so that kinda sucks. And the EBM5 is just awesome and you have 2 choices, you dont have to get the full mod version if you dont want to. And the race prepped is still sweet cause you get the break in TKO rear bearing the coated parts and I belive but dont quote me on the weighted crank. GO for it. LOL