Since I can't leave well enough alone I was thinking on swapping the speaker in my Carr Mercury. The Kingpin 60 that is in there ain't bad but when I swapped out the one in my Slant 6v with a Scumback it was a definite improvement. Being only 8 watts and me liking the Vox like middle postion on the drive selector, I'm thinking that the 15 watt celestion blue would be a perfect fit for this amp.BUT the fit is what I'm looking for feedback on. Will it physically fit ? Do you have to pull the cover of the magnet ? Also, just how good does it sound in this amp ?