Benz is about 18 months out with rebuilding cartridges. Supposedly Soundsmith can do it in 2 to 3 months. The problem is I have read that the cartridge doesn't sound the same anymore. I have read that the cartridge is brighter. I'd like to trade up but that would run me 1500.00 and I really don't want to spend the money right now. (I have a lot of medical bills this year) Anyone have any experience with Soundsmith?