I've got a small little 3W guitar amp I'm building that uses a 6F6 for the power tube. I'd like to try a 42 as an option by adding the additional socket. Most of the 6 pin sockets I see are entirely ceramic and, never having messed with those types, was wondering the best way to mount them? It's seems like they'd be prone to breaking. I see other 6 pin sockets with the regular metal mounting tabs, but its gonna take a month to get any as they all seem to come from China, except the NOS ones which are just way to expensive for this project.