I am with you. I was close with what I thought off the top of my head. The MC Schematics are saying that it should be the three bolts at 30 LB/FT. If you dont have the tools to measure that. Its a generally tight feel, but nothing that you are having the get your back into it on.
Hope this helps. If you need any other help or more info on what the rest of the tower should spec out to shoot me an email and I can see what I can find for you.
John@wakeboards.com
www.wakeboards.com and Midwest MasterCraft