Tremolo circuit 9v or 18v

[jethrofloyd67]

I guess the part I'm still learning is determining the resistance of the circuit. I just recently learned about high vs low impedance as it pertains to buffers, but I still don't completely understand it.
I know I still have much to learn.

Actually most of my experience is with breadboarding (I can't stand desoldering and do all I can to avoid it)
but I started off with simple boosts and in those circuits I found I lost noticeable amounts of bass below ~500nf.
I just assumed that always applied in every situation, so I decided to go overboard rather than under.
I never bothered to try any other values in this circuit 
But now I'm learning there are very few things set in stone
Thanks for that link! it'll be helpful with a few other projects I have in the works.

I haven't had a chance to retest the changes I made to the schem, but this is how I understand the Warbler schem.
I think I didn't notice a big loss of lows with the vib cause it doesnt have a very low-depth setting, its set to the depth I found most usable. the toggle for a slightly mellower setting may not make it to the final version, mostly there for testing.
But I did notice the vib mode was a bit louder as mentioned in the Warbler doc, so I'm guessing this should fix that?