A few years ago I did an upgrade on my Delta contractor's TS. Part of that upgrade was to add L-bracket trunnion adjusters, which are supposed to lock the trunnion in place. After the move, I went through the whole process of tuning up the TS. I checked alignment with a Betterly Uni-Gauge and all was good. But in the little time I've used the TS since the move, I've noticed the slot in the zero clearance insert has widened, but all of it has been to the right, so it's probably not blade wobble. FWIW I always use a Forrest blade stiffener.
When I measured alignment today I found the blade .005" off over a 5" distance. I used a mark on the blade to make sure I was measuring to the same spot on the blade. I don't remember what tolerance I had at the last tune up but I'm sure it was close to zero.
Is this kind of movement normal with the L-brackets supposedly locking everything in place. If I remember correctly, I didn't have this problem when I first installed them, ...IIRC.