I'm working on a little Univox for a friend who wants the tremolo speed slowed down. I know it's a question of raising the value of a few caps in a Fender circuit, but what about this one? I'm not in my comfort zone with solid state and I can't find any info on this question online. Currently the tremolo is too fast to be usable even at the slowest setting, and he's looking for maybe two sweeps per second. Possible? Schem attached, and thanks in advance...