[edgeleycanuck]

I'm a bit challenged using my phone to post a picture so I'll try to put in words what I used.
Picture a flat lawnmower blade(I have an old leaf spring, ground to a knife edge). Sharpen the one edge with a long taper, it will slide under the riser where there are no welds and then just strike the backside of the blade. It worked quite well. Just a thought.
On another note, I think that riser is also there to support the floor, so I think, and I'm interested in what others think, one should provide some form of support across the floor approximately where the front edge of the riser was.