BHB,
Ehrenberg??? That's just barely Arizona. Do a lot of work in that area for EPNG.
Any way, back to the topic at hand.
If you're just doing one, Jerry's pipe will work great. I've built a sweatbox, out of some 1x2's and some 1/4" plywood that works just great. I lay wet towels in the bottom. If it's cold, shine a 500w light on the side. I live in Mesa, so usually, the Arizona heat is enough.
You have a lot of control over the type of brown that you get. If you do like Jerry, card and brown every 4 hours, It will give a nice smooth chocolate brown. If you card and apply every 12 hours, it will be a little rougher and textured. You can almost achieve that "Plum Brown" color.
LMF is a nice product. Be sure to do your lock, and/or other parts at the same time. They will be consistent then.
Good luck.