Right now I am thinking of building an IQR mountain sled for next year.. Thats if I can come across a chassis at the right price.. I own 2 RMK 900's and will either have to sell them both whole or part them out in order to fund this project. I know that tunnel extensions and rear suspension and track will be needed for the IQR so some of my questions now are can the rear suspension from 1 of my 900's be used on the IQR? Is it a direct bolt up?? Can the rear section of tunnel from a 900 be used as a tunnel extension? Just trying to save a little bit and know what not to sell from a sled if I can use it.. Does anyone know on this??