Anyone ever try jamming a Musicpcb Tap Tempo Tremolo in a 125b with top jacks and external tap? Looks like it might fit...
Hmmmmm
(http://i2.photobucket.com/albums/y44/jpook730/Mobile%20Uploads/20160919_235527_zpshmfdqkno.jpg)
I didn't put mine in a 125B, but there doesn't look like a reason you can't do it!
Go for it!