I've got two, but have yet to need both at the same time. I bought the second one on sale a few years after buying the first, but it's still in the box, since the first one does all I need. For long rips, I feed the wood by hand until I'm down to about the last 18" to 24", then I use the GRR-Ripper to push the rest of the board through the blade. On short rips, I use the GRR-Ripper for the whole cut.