I am a pretty experienced racer with a very good understanding of tuning and breaking in Nova engines and usually get 8-10 gal out of them before I decide to try another model of Nova. Even after I run them for 8-10gal I sell them to guys who are starting out in nitro or someone who just really comes out every now and again to have fun most are still running at 15+ gal! Anyway recently I had a CRE p5 after about 5-6gal go south due to rear bearing failure with good compression still and never abused running VP 30%/9% it didn't explode but sounded like a chainsaw so I have got that one fixed. Well I ended up getting another REALLY good 5port Nova and I got a new gallon of VP added 2% castor but about a half gallon in it happened again rear bearing failure but still ran great but sounded like a chainsaw I came off to preserve the internals due the fact I have spent a ton of money in 2 months after running 2yrs with same engines until now! Anyway I am just curious if I'm the only guy who has had rear bearing failure running VP lately? Is there anyway a hard landing/chassis slap be the bearing killer cause I have had two new Savox HV servos fail also? I recently got a TKI3 and all of this happening since and I want to figure this out before I go crazy also before I tear up some more SHITE! I lost a points series after leading for half of the series then had two DNF in a row also going to Fall Brawl in Mrytle Beach soon ans want to go with confidence or might as well stay home! Also before this I have never had a engine(I have owned 7 Novas) just break or quit running premature EVER! I have switched to Byrons but now I have no engine to test/practice with so I just wanted some opinions while I wait on engines to be returned. I hope it's just a bad batch of fuel! Thanks for any advice or help! I did want to say that I know for a fact it isn't where or who I got the engines from they really are awesome engine guys that's a fact!