Yeah it is pretty ugly. I found no cracks on the one here. Saw no hosed marked Terramite but some look pretty weathered. Exploring this machine it seems most issues are from sitting out rather than from being worked above its ability the way my old T5 was.
Got to do some honest work with mine for the first time today, love it. Dug 6 bamboo plants with the 24" bucket and loaded them for a customer. I will guess 50% better performance than the T5. But the ground was damp, will know more when I dig a few in dry ground. I had already found the U-joint coupler and as you suspected it looked like it had been passed over on grease days. But I was pleased to have it over the plastic toothed coupler that connected the engine to the pump on my old T5. Hopefully the new grease will save the joints. Are those U-joints an off the shelf part number or are they made from unobtanium?
My T6 engine appears to be bolted solid to the machine. Am I missing something about the motor mounts you mentioned? How did you recognize you had a problem?
I believe I will drill another hole to square up that go pedal, I see no reason for it to be mounted at such an odd angle and it still felt awkward today. If it doesn't seem better one could always just put it back.