I'm using the Super Plus with copper spikes on a carpet/wood/cement floor I'm getting better bass detail,better specificity of images with much more detail.
Sounds like you are having good results.
My experience with the Townshend podiums under my Q3s was if anything less detail 😉 but a more natural bloom and body to the bass. Again my experience of live bass is that the crack/thump often seen as good and 'detail' is actually unnatural emphasis of leading edges. Real bass sounds blossom into reality (I'm using a double bass as my reference here) and the podiums really helped this come into being
Heather Masse's bass at the Wailing Jenny's this last Saturday sounded just like this and it's a very natural sound that dealing with this part of the speaker has helped with
Hopefully you are getting a similar result from the Symposium -- did you actually compare it directly with Townshend products on your Q3s?