Actually, John Benario in RCM's Hover column was describing how he read about rebalancing cranks from an article in Model Aviation (the AMA magazine) in one of the control line speed columns. I read them all religiously! DOnt know the exact issue but it would have been in 2001 or early 2002. Definitely in the CL speed column.

For all those rc guys that think there isnt anything to gain by reading the control line and free flight articles, those guys do more engine rework than anyone else! Read and learn... its all good stuff!

Hope that helps...

Andrew Coholic