First of all thanks Rick for this nice tremolo.
I just breadborded this version

it sounds good but in my circuit the volume is not constant while turning the Depth pot.
With pot at about 25% I have no tremolo (depth = 0) and unity gain while under that value signal gets significantly boosted.
Above 25% volume keeps almost constant, maybe with a little perceived loss, than it raises again reaching 100%.
Did you experience the same behavior?
I could live with it but it sounds weird to me having part of the pot acting as a boost, part as tremolo depth.
Any advice is welcome.