I've installed a home-made veritone cap selector linked up to a 500k tone pot but I'm finding in the lower cap values (0.022, 0.047, 0.068) the variation in tone is incredibly limited using the tone knob. With 0.022 its difficult to hear any difference at all although listening very closely there is a change in tone as the cap is rolled on and off. Having used 0.022 caps before (no veritone) I'm certain the response should be greater than this and therefore I'm not sure why. Does this effect imply that the circuit is shorting somewhere and therefore grounding alongside the cap? The higher values (0.1, 0.15) work fine, although maybe a little small in their tonal range. Has anyone experienced this before or got any suggestions for things to check?