All this talk about eyebrows makes me relate something funny. I just did the eyebrow fix a couple days ago. (Heat and aluminum inserts) Anyways, when I was in the disassembling phase, I noticed wood inserts were allready there. They were about 3/4" by 3/16" and maybe 12" long. When I removed them, I noticed they had a perfect curve that matched my eyebrows. Lol.
Also found a animal nest behind the grill. Not sure if it was bird or rodent. I guess that confirms mine as a "barnfind".