it would depend on the stumps and the condition of them, but more so the floor boards.
you had that fat guy who is sueing the government for falling through the floor boards because he was to heavy lol for the boards in his housing comision home. he was like 250kg or something.
a fish tank could easily weigh 300kg+ but that is in all in spot spot, pinball's dont weigh that much and would be spread out over the entire room, but you would hope there is a beam under at least a few.
but you wold look at how far apart your bearers are and how many stumps you have, if you have good strong load bearing beams that are a prety close together with good stumps you shouldnt have to much trouble, the idea it would tranfer allot of the weight to other beams to even it out.
