<font color=red>What have you done about your curl control?</font color=red>
So far, I've done nothing at all about the curl control. As I've practiced a little with the 4 n 1 bucket and the hoe, I've found I can do most things I've tried, although none well. The problem hasn't been the controls, but my inexperience with the way the tools work best.
My plan is to plumb an electrically activated diverter valve into the PT's curl circuit, with a button on the joystick. That way, when I push the joystick to the side, it will curl the dipper (PT curl) but when the button is pressed it will curl the hoe. The system has been used successfully for 4 n 1 buckets on standard tractors, so should work fine. Leaving it as is, however, isn't as bad as I initially thought, so other projects and grass mowing have taken precedence.