the bolts are (SS 8-32nc CS) which means they go in tight through a 11/64" hole . which is what I'm using in the top plate.
obviously the bottom plate has the thread cut into it...
the tolerance for radial movement of the two plate is in order of less than 1sec and at the radius on which the threads are, from the furthers pivot (bolt) in the block, that constitutes to less than 1 "thow" (0.001") I think that's good enough...
what I'm saying in Shade tree terms... them two plates don't move when the bolts are in and threaded
for re assembly, it is recommended too, that before tightening the block down finally, to screw in the two fittings, then to tighten the block with them in place.... It will insure a perfect seat of all components involved... access sealant will fill up any microscopic imperfections as it gets tightened.
I am after about 3 years of doing it this way, still 100% leak free..... and I am proud of that....
but I should watch my mouth, and not say that so loud ... there is always a first time....