> OK so now I know the TR3's are different than the TR4A->6's, BUT!: > 1- how are they different? > 2- are they like the TR4 trunnion's? Early TR4 used the same trunnion as TR2-3B, with zero caster. Later TR4 used a trunnion that looks very similar to the early one, but with a 3 degree angle between the pin & bore. -- Randall