I have seen some of those it has just a small nub on the top. Think i may have one. It will work as long as it is the dual coil version. I've seen like 4 versions of BDC heads and they will work on the PT3, Aerotank and Aerotank mega's. As long as they are the tall chamber dual coil type. So far I prefer the old PT3 heads the aerotank head with the enclosed wick area is not as good and i think it was just to make it hard to rebuild.