So my rt300 went 13,000 plus mies and seems to have finally hit an issue. I'll be giving them a call tomorrow but figured I would poll the crowd. I was using it when it suddenly started sounding labored and then seems to be grinding from where the cranks enter the main bike. I'm thinking it's bearings of some flavor but curious if anyone else has fixed this or had this fixed. I've never opened that up so i have no idea what the mechanism looks like. Anyone been in there? Had it fixed? Cost?