I love the F-2B but I want a 'Deep' switch as on the F-1X.  Could I order a custom F-2B with the switch or send old one in for the mod?

Look for a kern ip-777 . Been using one with an sf-2 dbx-160a and a crown macro-tech2402 or whatever its model is... loud and deep as hell!!!!! I do believe it is fender based and has bright and deep switches effects loop and di out. i tried fx-1 f2-b demeter vtbs201 or something sterile. just my $.02......Bear

2  (TWO)  ALEMBIC F-1X UNITS work well in stereo and you get that nicely configured  well engineered very versatile  balanced out that way . I think that the  DBX-160a  is a nice sounding compressor.