Finally, after a bunch of travel for work and whatnot, more progress. Y table is on axis, as they say. I ran into some documentation issues -- they say they "prefer" the ball screw housing to run at 2 or 10 on the clock. Every ball screw I've worked with says the housing needs to either go on top. Which, it turns out, causes the housing to jam into the table on the IH kit. I didn't feel like tearing it all down just to grind a notch, so I put the return at 2pm and left it.

Also discovered three rubber grommets labeled "bottom housing, all axis". I can't find anything in the docs about where they should go and don't see any obvious places for them on the housings.

Then I started to do the X axis and couldn't find the other circlips that are used to hold the wipers in the housings. Either I lost them or only got one in the original package, either way I'm off to the big box store to buy some replacements.