I received a reply from Cary. It looks like their upgrades have expanded beyond what's on their website. They now offer an upgraded choke as well as some Solan bypass caps that can be installed. Also, the larger coupling caps are now Mundorf caps as decooney mentioned. Mine must be a bit older since I have the Jensens in the kit.
I'm emailing the gentleman there for some clarification on a couple of items.
There's a local technician that I found that mostly works on vintage guitar tube amps that I have used to test my tubes as I come across them. I'll see what his thoughts are if he wants to tackle this project.
What's funny about this thread is the amp sounds quite good, actually. But since we can be a weird bunch and I think I must have been spoiled with the Decware, here I am chasing that last bit of detail.