[sdiy] building a classic transistor vco from scratch

[dan snazelle]

 I am interested in building either a mini-moog vco, an arp 2600 vco or a 303 vco on the breadboard.....however before I do that, I wanted to know if anyone else has built
one of these on the breadboard, and if the schematics contain errors or not.

I have never built a transistor based vco before and these seem to be the most clear as far as the schematics.....any advice appreciated