Allen wanted to know about the Varrox... Well, i've seen one in action. It huffs and it puffs and you get a big mushroom cloud of smoke. For my small operation, it seems like the perfect solution. I'd like to know if anyone knows if the effiency of vaporization is equal in a two story hive. I just found out yesterday from a reliable source that in order to get a 90% plus effiency when dripping oxalic in a sugar/water solution, you need to separate the boxes and drip in both of them. The effiency when only dripping in the top box of a two story hive is said to be around 55%, which is far from enough. Having to take the boxes apart to tip the upper one makes dripping seem like a less convenient method. I'm happy though, that i finally got a good explanation for the low effiency of my dripping last fall. /Mats Andersson, Stockholm Sweden