I know some may claim blasphemy and call me a heretic but I simply couldnt stand the plastic knobs that came stock on my mark V. I had one break in half when trying to adjust one. I did a little research and found who actually makes mesa's knobs for their rectifier amps and I got me a full set of 23 (front and back). Not a huge change but I like the look and feel much better. Only downside is I now have a pile of plastic knobs with no use for them, lol. But here is a little before and after. If anyone wants to know the knobs are made by penn elcom. I believe they are made in the uk out of solid brass. You can get them in chrome or black and they make aluminum as well for the lightweight guys. Standard dot color is the brass underneath.
before
after
before
after