I have been running the B44 since December. I must say it is rather fragile. Last Saturday I went through 2 front arms AND 2 front bulkheads, that seems a little excessive. Never got to finish a race, no fun at all...so much so that I came home and started to put all my associated stuff on eBay so I could switch out. Not sure there is a better alternative to the 44, although the new HPI Hot Bodies D4 WCE looks pretty good, but not out till May. Some early reports talks about arm and shock tower breaks though. Just can't win...