@dwette We are now having a cross over of our thoughts on this subject.
Firstly I can’t use a Rubber Material with Vinyl for extended periods, it is usually only in use for a demo’ purpose only.
I am a advocate of Densified Wood, of which one Brand of this material type is Panzerholz.
Clearaudio are quite involved in producing designs where Panzerholz is seen as a material of importance, I suspect there will be a Spindle Weight available with Panzerholz in place of Ebony at some point.
I have been demo’d a DIY Panzerholz Spindle Weight and have been impressed with it when used in comparison to other materials used for weights on a PTP Solid Nine TT.
The PTP was used as the TT, when a group of seven HiFi Group Members had a meeting where a Mat and Weight comparison was being demo’d, with differing materials being tried in conjunction with each other.
My next port of call, when the Vinyl Source is back in daily use, is to have my SS weight modified and produced as a SS composite with Densified Wood, I have enough of a good experience with both these materials to suspect the marriage will be a long lasting one.