I have only had my Dk35 for a few days. I was just looking around and noticed the 4 bolts (2 left/2 right) for the battery tray and the 2 treaded robs for the battery lock-down were very rusted. My thought is something (possibly coolant) is getting down to this area and has caused this premature rusting/corrsion, maybe battery acid...but unlikely. Anyone else noticed this?