SON OF A BITCH MUST PAY
Also, is the "No Heat - No Limit" slot valid? That is, although every gang starts at 1 (or more) Heat, it's possible to lower my heat my below 1 to "No Heat"?
Correct. You can lower your heat to zero allowing you to sell as much contraband as you like during Black Market. You also return to zero heat whenever you Take The Fall too.