I started with the plus 1 in 94 then in 07 bought the 850 sapphire after a year they brought out the diamond and gave me every penny I had in the 850 plus 500 dallors plus luggage plus free classes and a special on other stuuff . I ended up paying 6800. I too loved each machine. I kept the plus 1 but traded in the 850. I had no problems as you spoke of. Good luck. I hope it works out.