Kimber Kable 8tc V.S. 12tc

A PS: the Kimber Postmaster spades are not really very good IMO. They do not make a good contact, cannot be tighted down much without ruining them, and the rubber insert gets messed up really easily.
I would use WBT spades or some other 'normal' spade for the 8TC.
i had Postmaster, and took them off. The WBT are expensive, but can be reused over and over as they lock onto a pressed clip that by itself cost $2 each.

I never really had a problem with the physical design of the Postmasters. My concern was more that the rhodium plating or "kimber ultraplate" that they use on them was contributing in a negative way to sound quality and possibly responsible for the slight edge and glare that I experienced. I thought they actually made very good contact, at least in my system, and I'm not a fan of overtightening any connections. I used them for 20 years with no problems.

My only experience with WBT connectors is with their locking RCA's and I was not a fan of those either. In RCA's my preference would be for the higher quality Vampires followed by Eichmann Bullet Plugs, although the latter is a bit of a finicky product.

I have used Rhodium plating on Loudspeaker terminals as well as power cord plugs, I would much rather used Gold plating,the Rhodium tilts up
The frequency and has a bit of glare or edge IMO. The Silver,or Gold
WBT next gen ,or other WBT model is far better in every way then Kimbers post master connections.