Xtol 1+1 for 40c for 40min is a reversal time I came up with, it is not suitable for rehal negative processing (normal times and temp are more suitable here) which is what is done above, if you want to reduce the processing time a small amount of fixer in the dev before processing will do that, but I don't have amounts/times on me, I stopped playing around with it at that point.

After Xtol 1+1, 40c, 40min, stop, rinse, pull out in the light, then do normal C-41 from there. You'll get a reversal.