I have been working on a vibe based upon a design that incorporates features from JC's design and RGs Neovibe.
In my original build, I used the traditional caps at the collectors of the phase stages.
Reading an earlier post, I tried JCs recommended alternative cap values of 0.0047u, 0.0033u, 0.0022u, and 0.001u.
On my particular build, the top end became much more "swirly" and "alive". This apparently coincides with an appreciable greater "depth" to the swirly effect. For comparison, I now set the depth pot at about 1/2 to achieve the same "swirl" that required a setting of max or near to it.
Over all, the sound is a little cleaner, a tad thinner, and has a relatively greater "pleasing" quality to the effect.
Thanks JC for sharing those mods. My vibe is now ready to be boxed.