If the OP will allow, I'll admit to unsuccessful efforts to get replenished XTOL to work in my JOBO process. I've got the smaller JOBO, so with 120, it's a max of 6 rolls (if memory serves correctly), and with 4X5 a max of 12 on two 2509 reels. My standard fluid for the JOBO is the max safe for the motor: 600ml. Difficulty I had was aeration. While waiting delivery from US Plastics of some really excellent air tight plastic bottles, I called Omer Hecht at Catlabs - the US Jobo dealer. Discussed my difficulty, and he suggested JOBO's aeration of the chems as simply not as suited to replenishment as other agitation approaches. He didn't suggest it wasn't possible - only that it could be difficult.
And yes, I probably could have upped the replenishment chem and I think that's probably a good move. FWIW, I took the easier move and simply switched developers... to Bergger's chems. Since then I'm using one-shot Caffenol mixes, but still open minded, and yes XTOL is of renewed interest. I suspect that works well for my good friend Adrian Bacon because in his case, replenishment is based on much higher volume and he's not dealing with a X quotient of the "new" or the "old" simply sitting through a work week for much of the time as we go about our non-photography jobs. So the number of variables in determining a replenishment scheme in his case is probably lower than would prove the case for guys like me... and the real question becomes is it worth the trouble of debugging when there ARE other options? At the moment, I've got enough variables in the mix of learning 4X5 to not seek additional by choosing to pursue a replenishment scheme for my developer. Adding a 2 Fix process is one thing and comparatively simple. With INVERSION and not ROTARY agitation, I suspect low volume guys like me might find less difficulty.
But maybe I'm missing something?