The MAC 70mm TB's have a slightly larger flange than the 65's do, at least the ones I've seen. That should hold your extra adapter in place just fine. The 70mm BBK I had was the same way, though I had a thick piece of steel as my adapter. The hole saw didn't like that to much! LOL!

I doubt I'll make it to Texas, but let me know when/if you get to K.C. again and I'll make the 3 hour drive down to see it.

http://www.bnmotorsports.com "And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my CEG brothers. And you will know I am the Moderator when I lay my vengeance upon you."