[SSJ343]

Update. It seems that it will stuck in vertical slot. Vertical slot is .440 wide and the shaft is .437. Only thing, that keeps two halves of shifter inline is the two bolts mentioned in Seans reply. These bolts are fully threaded and halves can easily move more than .003 clearance allows.

We widened this lower vertical slot to .452 (same measure as upper vertical slot is!).

Bolts were replaced with ones, that have straight portion above thread and they seems to force shifter halves in line. We will see if it works next weekend. On table it seems to work fine.

This is brand new equipment and has less than 15 runs on. It has stuck 3 times now.

Thank you all about comments and messages.