I recently got back on the StimMaster after a year off. Wondering if any users are familiar with the set-up screen that is set at 140 under gluts, hams etc., (not threshold set-up screen). If my memory serves these settings were set by the manufacturer. Should these settings be adjusted and what are they for? I'm also having a tough time getting past a 2 minute shut down even at 0 resistance. Any info would be greatly appreciated.