I find there seems to be some variations in the Rover catchers or maybe it is that the ones I have are not all Rover, but I find that with a bit of flap modification I can usually get them to fit on the high arch alloy chassis. I think the biggest killer of most of the High arch Victas is the catcher gets broken and nobody wants a mower without a catcher so they get scrapped. Pity because the alloy base way outlasts the steel bases