I have a C model and keep having several problems with it. I think I spend more time working on it than I do using it. They are usually easy fixes, might just be putting a Band-Aid on it until it breaks real good, but I still have to keep taking it apart and putting it back together. My question is what is your opinion on sending it in for a complete overhaul or just buying a new machine? It's tempting to just by the CX but there doesn't seem to be that many upgrades from the C model. Thoughts????............