Go to your MCH reference and bump it down 1 or 2 notches. I've only owned my UD3P for a bit more than a week, and I've found that (I said this previously before) it likes the MCH reference bumped down one or 2 notches below stock (stock means that if you set VTT to 1.2, MCH reference would say .760, duals work better at .740 to .720, to as low as .65), and when you raise your VTT it scales properly (.760/1.2= .63x; .836/1.32=63x). In other words, it's just more stable at around .60x.

Again it may not help, but it's just good to get educated on some of it, as it may help in the future. Good luck