@grannring - we built Class A tube mono block KT-77/EL-34 tubes that use 4 Milflex copper caps per mono. We have not found them to be aggressive at all so as you know each application is different. Have not tried the V-Caps in the mono blocks as of yet but we plan to.
@vinlyvalet - thanks for your complement. If you are located in the NYC area we have set-up a listening room for people to come and spend some time listening to music.
Happy Listening.