Okay because charcoal is about $5 a bag and I had enough left over to heat the files up again I did so. This time I left the ash from the previous burn in the bottom and even tried to pile it up around the files a bit.
The burn seemed more even this time but the unique thing I forgot about I learned after the fact. When not using a grate on the bottom where the coals go the files bent with the heat and the curve of the Weber. You can see the slight curve here in this picture. Maybe others will learn from my mistake.
While the files were still warm I was able to bend them back to near straight and because this is a learning opportunity I wasn't too worried about ruining something.
They seem to look good so I took them over to the vice and tried to file some of the metal off and sure enough it came off and fairly easily I might add.
I went ahead and checked the rest of the file and for this rookie's eyes it looked good. Now off to work and maybe I'll be able to do some shaping up later this afternoon.