Dan,
I agree about the foot pedal action. Terrible design. I plan on upgrading mine too. At the very least either drill out the holes and install a larger (shouldered) bolt, or weld/redrill ...to tighten up.
As a side note, have you checked and drained/re-filled your planetary drive motors under the seat? If not, I would recommend that. If they should happen to seize up, that would be the definition of a bad day. Also good to go around with an oil can and lube up every point on the hand control linkages. Don't forget to grease the zerks behind the wheels (which you've probably done), and the hidden zerk at the u-joint.
The HTO is an anti-foam additive. Foam is compressible so the additive helps avoid it. Probably not a big issue with the way a hobby farm guy uses their loader. Glad it's working out well for you.