mail box mod was my 3rd kick at the cat and is the best way i have found for my unit. just buy an AMNPS from Todd or wherever and you are winning already. can do long smokes without baby sitting and very economical on pellets.
as far as lighting them i saw a thread on here awhile back where the fella lit them with a torch and then hit them with a hot air paint stripper, as i had one already for peeling the tar outta my fridge i tried it. the flame takes off and starts roaring like a jet engine ... LOL.... i just blow it out and toss it in my turkey roaster and away we go. a hair dryer would also work well if ya have an old one laying around.
i dont know what your plans are but i really enjoy having my rig on a dolly with casters so i can move it around.
now for the door, i just used really light gauge aluminum, screwed it in with some small self tapper screws, and for the door gasket i used the stuff from this thread
scroll down and you will see a pic of the invoice. just punch those numbers into Mcmaster-Carr and the stuff will show up. you need a commercial address to ship it to, they told me no domestic shipping but everyone knows someone with some kind of shop :0)
i put it on my door, not the fridge, and laid the door on a couple saw horses, then used high temp silicon to hold it in place and masking tape across every few inches. then laid a piece of plywood on it and loaded it with a bunch of weight, what ever is handy to keep it down over night. next day i did nice beads along both sides of the seal and it works very well. not as pricey as one would think !!!
HOPE THIS HELPS...