No hum here!? Is it a newer Silo or an older one? The older ones were built differently. If it's a newer one then I'd contact customer service to see if you can get some answers. It could be as simple as a loose wire inside.
Hey I just bought a Silho HSH and I'm getting a lot of Hum even from the humbuckers.. and it's not my cable or pedal. I put it straight to the amp that's what I get. Are you getting same thing with yours?