A small fold-able chair, soft seat preferably. Seat cushion and such will be thrashed of course, but it makes for a nice portable stand..
Used that to clean/Blast engine and remove top end. Once top end was off, used a flipped over standard milk carton, from behind a grocery store, for everything lower case. In terms of flipping the case over, the cylinder studs go through the carton holes as it supports the block upside down.
I was gonna make a stand but... seems like a project in itself for this one XS build.