So I have a 1980 Marshall 2204 incoming. It has all of the original filter caps, and I will likely have them replaced. I know there is some debate as to whether this is necessary, but I like to be proactive regarding any potential problems. Having said that, I have done a bit of research, and I can't seem to come up with a ball park price for such a job. Assuming that the tech supplies the caps, what general range might I expect in terms of cost? Also, if I do buy the caps myself, what is a good source for F&T caps, and exactly which ones do I need for a 2204? Thanks.