So my last three runs on this cooker i've noticed that the underneath the plate that this black soot looking cloud is forming it's also forming on the burning elements. Is this normal? I washed it all off after my last run. but it keeps coming back. I'm just thinking safety...

Hey Johnny adjust you flame, you air to gas ratio is too rich, to much gas not enough air. Either that or you have the flame turned up to much. You should only have a blue flame, maybe a few flikkers of yellow but not a lot of yellow.

Have Fun.

Yep cleaner flame will cure that problem...

Hi Johnny, I use Blichmann propane cooker because it heats up faster and I find it more controlable. It also works whether your electricity is available or not. It will also work anywhere I take it, a friends backyard, the woods, etc etc. I get 6 to 8 runs off of a 20 pound tank Which I find fairly economicle. I'm not sure what it cost's to run electric but would like to know.
The downside is that if you have a leak with propane your combining a highly flamable gas with a big flame. So when I start the run I have an exhaust fan at ground level to vent any fumes, I check all of my connections with a spray bottle of soapy water, and I keep a fire extinguisher on hand.

With an electric boiler your heat source is inside, which mitigates your explosion hazard. If you have a leak you have more time to find and fix it, unless something sparks. If you get some additional equipment the temperature range can be made very controlable.
The downside I see with this type of heat, mind you I use gas, is it takes longer to heat up, it costs more to complete this type of set up, and I believe unless you run it with a PID or Variac, or maybe both, you won't get the variable heat control you can with gas.
I think PID's and Variac's are also fairly expensive, That's something Scotty or someone else with more knowledge about the electric side of this hobbie could tell you more about.