Im about to send my 60w mark IIC for a c+ mod, so you don't think mike B. Could give the ++ mod with the relay under the mid pot?
The MKIIC+(++) are either 60w, 60/100w, or 75w Simul-Class. (or the Coli)
There were a few IIC++'s made (probably 5) that have a pull mid, which use a relay to...