[TR] TR# trunnions

[Cosmo Kramer]

Randall wrote:
Yup, the 4A uses the same design as the TR5/250/6.  Earlier TRs (like the
one Frank is working on) were different, though.
-- Randall 
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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?

 I have a set of these (TR4) somewhere stored away. The TR4's are narrower in 
diameter as well as the vertical link & the Trunnions have a different Castor 
angle (I think 0^ where the TR4A->6 have a 1^ angle of Castor, I THINK?). -Cosmo 
Kramer