Just bought a 350 with an Erson gear drive and noticed the aluminom cover had been damaged. No visual evidence of the gears being damaged though. I bought a similar gear dirve on E-bay brand new about half the cost of the Erson brand and only needed the cover. Dont want to replace the gear drive asembly but will replace the cover.Does any one now if theres a difference in the gear drive cover. The overs for a Erson,Molodin and the after market which is made in taiwan look very similar.