As I'm fitting a new secondary mirror to my 10"LB I'm thinking of fitting a heated secondary holder. I'm looking at the Protostar or the AstroSystems holders. I would like to keep the existing spider and hub and just replace the plastic holder which is much to big for my new secondary mirror.
Has anyone got any useful

comments or advice they would like to share.
Is Protostar's electrically active spiders a good idea?
Thanks, as usual any advice would be appreciated.
Richard