(((((Robin))))) sounds like a tough week :cry:
I don't think you need to push him. He is doing awesome (0.6u, did I read that right????? I haven't been totally tuned in lately, so WOW, that is great progress!), and clearly going in the right direction. Keep him in the best #s you can without stressing over it, and if/when Mr. P is ready, he'll take over.
Remember too that sometimes if you see lower #s that make you nervous, it may be that Mr. P is pitching in to get the perfect #, rather than a potential hypo from too much insulin. Of course you can't know, so you have to treat it like a potential hypo & be vigilent, but I wouldn't stress yourself too much over the lower #s. Meaning, don't let those greens scare you into undershooting (ok, pot calling the kettle black here ohmygod_smile ).