swap

I have my buddy's MT15 that I have been checking out and love it. I am considering ordering one. However, the new ones come with the 5881's. I am wondering if i for some reason do not care for the 5881's can I swap in 6L6GC's in it or is there more to it than a simple tube swap? Thanks in...

A small story, some observations and possible learnings. I've had my McCarty 594 double cut for a few weeks now, and like many others I found the 58/15 LT, in the bridge position a little bit lacking in drive. But I was quite aware that it supported the middle position by blending with the neck...