Robert
Yes, these are a required part of the kit needed to mount the Carriers, Sets, No. 23 to the wireless table.
As an aside to all, and forgive me if I mentioned this somewhere else on the Forum, in a Galaxy far, far away, but with regards to the little u-shaped rubber/steel foot assemblies used with these Mounts and all the steel Carriers, Sets for the 19-Sets, they need to be bolted down when under load. If they are not, over time, the load bearing down through the centre bolt spreads out towards the two steel foot plates, pulling on the two rubber pads in the middle. The first sign of this taking effect will be that the steel plates of the feet no longer sit flat on a table or bench but start to curl and point upwards. If left unresolved, they will simply tear apart. One way to prevent this is to cut two strips of 1/2" or 3/4" plywood long enough to reach both foot assemblies on one side of your Carriers. Countersink appropriate holes and from the bottom up, bolt the plywood strip to the feet. That will stop any further spread/disintegration of the feet and still allow you to move the set anywhere you want to as needed. The design of these feet in this regard seems to be a bit of a weak point. A better system is the round rubber donut assemblies used in a lot of electronics, where the load transfer is straight down and then out around the circumference of the donut equally.
Anyway. Save your feet. Bolt them down.
David
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