Gearbox Tolerances

Renewed all the bearings and sliding dog in my rebuild. Changed the loose gears from pacemaker to Li150.
The Gear stack with both sets of gears is level with the layshaft and all tightens up when the endplate is fastened down.
Pulled in the shaft and have a 1.6 min end shim. Smallest I have. Casa Hub bearing .Is this the problem ?
The Gear stack with both sets of gears is level with the layshaft and all tightens up when the endplate is fastened down.
Pulled in the shaft and have a 1.6 min end shim. Smallest I have. Casa Hub bearing .Is this the problem ?