Instead of buying an uncapping tank I made an uncapping frame. Recycled Maple rails to hold 20 frames supported on 2 by 4's.
I sat the uncapping frame on a low work bench. I then made a cardboard "V" shaped trough, and covered it with wax paper, overlapping so the drips wouldn't run onto the cardboard. The trough sits on the bench under the uncapping frame.
Lastly, I propped up one end of the work bench a couple of inches.
I uncapped a frame over a big baking tray, and then rested it on the uncapping frame. Repeat, and repeat.
I processed 45 gallons this way, the drippings went into a stainless bucket by gravity. After I was done the wax paper was thrown away and the cardboard was recycled.
I am not going to buy an uncapping tank.