With a lot of BBD discussion around here lately, I was inspired to re-investigate my asymmetry issue with this pedal, as it's still been annoyingly evident. I noticed that, both on the Moosapotamus and Lectric-FX schemos, other ICs are indicated in addition to the 1458 for IC4, the LFO generator. So I did a simple swap of first a TL062 and then a TL072 for that 1458, and I found that, while it still doesn't want to be truly 100% symmetrical, and the closest it will get is just at the point of dropping the "auto" trimpot voltage divider as low as possible before collapsing the LFO entirely, I did get significantly better results with both chips than with the 1458. The TL072 got just a hair closer to my ear, so I'm leaving that one in. I also needed to leave the 68K and 82K resistors (R45 & R46) in the "wrong" places in order to get that voltage low enough (it reads ~6.07V before the LFO collapses). I still don't understand enough to know why it has to go so far out of spec in order to get the LFO even close to symmetrical, but at this point, I think I need to be actually done for real this time. I just wanted to update this thread in case anyone in the future has similar struggles.