Hello pbmax, fellow Mag operator here. I'm in my 2nd year with stoker-fed coal, and every day I figure something new out. The fellas here have a wealth of information, just ask. Anyway, is there any way to get a pic of your stove posted- it sounds a whole lot different than mine, I have the distinct feeling after reading other posts here that the design of the Mag has "evolved" shall we say over the years. I'm curious, plus I'm no expert on design, but here's what I've found:
If you are pushing red coals off the grates, you are wasting it- once that coal leaves the grate, it will cease to burn. I usually try to keep about 1 inch minimum of ash at the end of the grates, which is affected both by the feed rate of coal and the air fed by the blower- too much or too little of either gives me lousy heat, but when she's set right she really cooks. Surface temps on my Mag run in the 560 range, and the pipe temps run 230-ish. I heat the first floor of a somewhat breezy 1799 farmhouse, and at 28 outside now it's 72 inside, running on the thermostat. In pilot mode, my timers are set to 4 on 12 off I think.
Also installed a barometric damper on the exhaust pipe and a manometer gauge made by Dwyer to set the draft- this helps a lot in setting the air flow correctly and getting efficiency and good heat. I like to adjust my settings from time to time, trying to "fine-tune" the burn and get max effect out of the burn. There's a lot more, I'd suggest going through the other posts and you'll pick up a lot of good advice and tidbits.
I figured out how to use the wife's camera, so I'll attach a pic of what my fire looks like. Good luck!
P.s.- ouch electric heat
I've always seen that like heating a house with a giant toaster