K94max, thanks for all your insight. I wish I had read your post right when you posted it as it would have saved me a part. One of the things that's been nugging me is that when the blades were idle, one of them seemed to tip down slightly. I had figured this was just due more to physics than anything else, but I finally decided to check the spindle. When I pulled the blades off and stuck the allen wrench in the first bolt, I was surprised to find the bolt was actually not tight. It unscrewed quite easily. Same for the other side. When I got the spindle out, my suspicions were realized, the spindle was slightly bent indeed. Unfortunately, not having read your post, it appeared that the spindle was made of hardened steel or gun metal or something. So I dealt it a more than sufficient blow with a hammer to render it defeated! Oh well, live & learn. I'll need to get a replacement. Do you know if the Blade CP uses the same spindle? The not-so-LHS has Blade parts but no Axe parts. [] At anyrate, that was probably the root cause of my vibration. I'll check all the other stuff systematically as you suggested once I get the spindle replaced. Thanks again.

Revo_Rash, good idea. If I end up at the LHS today I'll bring the battery and see if they can check it. I do plan on getting a lipo, and have spent the better part of a week trying to decide what setup to get. I can deal with and justify the cost of the battery, but all the other stuff, charger, balancer, power supply, myriad of connectors, pieces and parts to marry them all into a charging system is a bit overwhelming and hard to justify. It would appear I'm going to have to spend as much on a power solution for the Axe as I did for the Axe itself. I'm probably going to go with the TP1320 that so many here have touted, just don't know beyond that yet. I like the price of the Mega Power batteries, but I've read some less than encouraging posts about those. Thanks for your input; it all helps.