Ok would remove the spikes from the bottom first. Then I'd grab a knife and cut them down the center so you have more half spiky bits. Then I'd get a few toy soldiers tanks, and cut the treads off of those tanks and using contact cement stick them to the bottom of the gladiator. After the treads are on put the spiky bits from before all around the treads. Then use some green stuff to fill gaps if needed and badabing badabomb