Suggestions for a vintage tremelo pedal.

[Neutral]

I've decided that my virgin project will be a tremelo pedal, because they seem simple to build, and I want one!
I am after a few suggestions to point me towards the right schematic.
I want a basic classic sine wave based amp tremelo.
Knobs I want:
-Depth
-Rate
-Volume (I want PLENTY of volume to boost it louder than the bypassed signal, now that I think of it, if the Depth control was able to compleately flatten the wave, you could use this as a straight volume boost, now that would be cool!)

If there is a circuit that adds a sine to square wave shaper, like the marshal tremelo pedal, then that is a bonus, but not really desired, I want to keep this fairly simple.

I would really appreciate any suggestions and recomendations from you experienced folks!

Thanks.