Just finished wiring up my Weber Revibe build today. This thing is a Fender 6G15 outboard reverb unit with the 6G12 harmonic tremolo crammed into one chassis.
With dwell, mix, and tone controls, the reverb is capable of being subtle or way more intense than the built-in Fender reverbs. It is freakin awesome.
Then there's the 6G12 tremolo which is like a tremolo and 2 stage phaser/vibe at the same time. It is mesmerizing, deep, and just cool.