Yes, I think you can take him up to 0.75U. Is he getting a snack at +1? You might try feeding slightly higher carbs at +1 and see if that flattens him out. The higher dose might make him dive harder at onset.
Try and aim for 8% or so. It's a bit of trial and error. Depends on how carb sensitive he is. It will take a few cycles to figure out what works.I can try mixing a little MC in with his normal +1 LC and see where that gets us. Maybe just a quarter MC or should I try more? If I don’t hear back that’s what I’ll try!