I thought I'd share a few pictures of the Manton style of trunnion upgrade. These are a bushing style of trunnion upgrade. The shafts are tool steel. The bushings have a lip on the outside. A shim is them spaced between the bushing lip and the C clip.
Manton trunnion upgrade.
These are almost twice the price of the Straub bushing upgrade ($310). I like the fact they are tool steel and have the lip and shim. The trunnion shaft is also slightly larger with a thinner bushing.
Manton trunnion upgrade.