I tried that and as soon as the flared end of the shaft makes contact with the trunnion, it stops moving towards the nut. As I continued to tighten the nut, the washer on the nut side starts deforming as it is pulled into the slot. This effectively locks the trunnion in place and prevents it from moving at all. I removed the nut, replaced the washer, and snugged up the nut to find the balance between being able to adjust the table and minimize wobble.
I did hear back from Record Power, and the answer was a little wobble is normal and is not a design fault. I am happy with my modification that removes all wobble.
If I can fix the table tilt along the axis of the cutting direction, I will be totally pleased with this saw. Record Power hasn't answered my question about this yet. I think the only solution is to put shims on two bolts between the table and the trunnion to make the table perpendicular to the blade. The table alignment on one axis is good using the adjustment bolt (Figure 5.2 in the manual), but there are no adjustments for the other axis.
I ordered the Axminster Rip Fence upgrade and it scheduled to arrive today. I'll install it this weekend and report back. Changing the blade will require removing the fence, but according to the instructions, this appears easy to do without affecting the alignment. The main advantage is the ability to use the fence on both sides of the blade, which is not possible with the standard rip fence without relocating the fence rail.