BOP is my first and , so far, only personal machine. I've had it for 4 months and it resets my brain everyday after work. I'm a novice on the technical side but I've been able to make all my own repairs with a little help from the Internet. I just replaced the right flipper diode; it's the first time in 30 years I've picked up a soldering iron. I'm looking forward to reading this whole thread.