I started building a new forge and would like some advice on spacing burners. I have joined 2 propane tanks together and have a 6 inch opening at each end. I have 17 inches of flat straight line to place what I was hoping to be, 3 burners. Now that I have it built, it don't look like enough room for 3 burners. The entire forge is 22 inches long from 1 opening to the other. I wanted 3 burners because I can't heat treat a long sword. The first one only one I made looks pretty but not tempered. Just an ornament. Will 2 work?