Nice work... days are getting longer, it's almost six speed season!
Who did you get the mainshaft from? Was told they were all on backorder till feb.Actually just order up a new mainshaft, 5/6 gear and a 5/6 sychro from them. Hopefully I can put my transmission back together next weekend.
Yea good point on attaching it to the case. Let me know if you find a shim kit,Looking at your photos and my understanding of the shimmin procedure from the tremec book, it seems to me they want the dial indicator to ride on the opposite end from the tool/shaft your pulling on, where possible. I also would try to have my dial indicator anchored to the case. This should prevent any error from showing up in any rocking on the press your photos show you doing this on. This might mean anchoring a piece of steel to the case for the magnetic base.
Also thanks for reminding me I need to add an extra hole to my work bench so I can get to the plug in the input plate from below. Much easier to mark and drill now while I can just poke a sharpie though the hole to mark it.