I used a hacksaw to cut mine, probably took about 10 minutes per stop due to my dull blades and obsessive-compulsive desire to make them perfectly flat on the bottom.
I don't have a pic handy, but it's easy enough to visualize. Just imagine that the lower part of the "figure 8" below (just to the right of the red coil spring) has been removed, leaving only a round/oval rubber piece bolted to the undercarriage.
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