David - You are continuing to do some really nice looking work!
Just comparing to my Kwik-Way loader, I'm thinking that the tie rod style cylinders are probably more than you need, especially for the bucket. (None of the Kwik-Way cylinders are tie-rod style). Also, your lift cylinders tie in after the bend in the lift arms, where mine ties in closer, before the bend. Engineering trade-offs; mounting further away like you did will give more lift capacity at the expense of speed and weight (although of course you can compensate for speed with a bigger pump). Even with the smaller standard cylinders mounted closer on mine it will still lift more than the tractor can handle!
I mention it because even having mine on a Super, you can feel the weight of the loader, and of course, especially when loaded. Any excess weight of the loader will take away from the payload capacity.
I am certainly not criticizing, you seem to have thought this through and it looks fabulous! As an engineer, I'm just mentally rolling around the design differences; just something that interests me.
I see you have beefed up the spindles, and that is surely the weakest link on mine. I have broken the steering side once, the wheel was in a depression and I steered too fast and snapped the top right off!
(Hydraulic power steering has a down side, can't feel steering resistance as well!)
Anyway, really enjoying the build, keep the pics coming!