I would start here
The Chiron ( Klon clone ) is in my top three ...
The Super Dupah Drive is also a really good one ... about as versatile as you can get for a SD-1
there's a few more options here...
you need to get in there with a Multimeter and check everything .... from the continuity of any connections from wires to ribbons ...
and you need to be able to check the parts to make sure they are good and within tolerance
and after all that .............. even if everything checks out...
it's basically two separate Chirons that will run into each other if the inner jacks aren't used
or you can use the inner jacks like a loop between the two ...
I could do a limited edition RT blood splatter edition .... lol ... actually not a bad idea
Shredmasters are pretty cool .... I had an original when they came out .... I've built several in the last few years ... they sound even better with quality components .
I think it's more to do with the phase inverter section on a Plexi circuit ......
from what I understand ..... and have experienced with my Granger Plexi that I had .... and SV20H that I had for like a week ...
Loops don't work well in Plexi circuits ..... that's why Suhr won't put them in...