I found a steel drum available that was used to hold bio-diesel. I haven't seen it yet, but assume (I know...) it doesn't have a liner, and that with a good hot burn, and some pressure washing it should be fine for a UDS? My question is on the lid. It has the open top, spring lever locking lid, and has a gasket. I'm sure I can get that gasket out of there, but was wondering about that lever. Are those types of lids ok for a UDS, or would a closed top that I have to cut out be better. BTW... cost is only $25!