I don't know if someone else has done this before, but I created this while trying to figure out a cheaper way to stick domes and stuff on a 4-wide boiler without using part 6222, which is absurdly expensive in many colors for some reason. The bottom of the boiler is not as smooth as the rest, but that area is usually not so openly visible anyway. I’ve used this on the “Tunnel Gremlin” and the HF110C already. submitted by /u/LewisDeinarcho [link] [comments]