I made this about 1 year ago, saw it at a baytubers tournament. I use 1/4 tubing to go into the kayak connected to a 1 1/4 to 1 1/2 coupler and the rest of the tubing is 1 1/2. No sanding or cutting required and the coupler fits perfectly into the notch at the top of the pole hoder in the revo. If you wanted a tighter fit, you could add cork or something.