Hi, sorry to hear about the back. I use a Unicolor drum now for my developing and it works great. I have for a long time used the hangers and they work fine also. The chemistry works out to be about the same over the long haul.The advantage of the drum is that once you enclose the film in it, you can then turn on the lights. and it is easier to keep your chemistry at the proper temperature. james(posted 9073 days ago)