[Richard Hudgins]

Ant,

The upright pickup points need to be in captured in double sheer.

Single sheer will not work for long. The material of the upright is quite brittle and will not stand Annular loads.

Also, the stock bushings will migrate in the mounts and are too soft for your use.

Put the mounts in double sheer as shown in the photos that I posted before.

Please listen, this advice is from experience with these uprights and much testing. JBL does it this way for very good reasons.

.Ant, Please note that I posted the above before I saw your post. Internet timing, Hey?

I think that you can make your system work if you do a couple of things.

1. Make hard urethane bushings for the pickup points (90 shore A or above)

2. Have the inner bushing have a flange that stops the migration of the bushing through the pickup point.

Note: I still do not like single sheer on this upright, it is a 356 casting and does not like to put in a "bend" loading.

I can send you photos of the system that JBL uses if you would like. It would be much better than me typing forever in an effort to explain.

Let me know if you would like this