Well I bought two packs of the diamond sharpening plates from Harbor Freight on sale for $8 each. There are three different grits in each pack (180, 260 and 360...I think). I didn't like having to guess the angle with them laying flat so I thought I would borrow Sal's idea and mount them at the right angle. That way all I have to do is slide the knife straight down for the perfect 30° angle.
My son-in-law gave me some 2'x4' pieces of one inch thick plywood. I measured the size I wanted and then set the block of wood on the edge of the Spyderco Sharpmaker and transfered the 30° to the wood. Then I cut it out and glued the two shapes together with Gorilla glue. I sanded them down the next day and nailed two of the 360 grit pads on the angles.
I sharpened (reshaped) a pocket knife and two 10" kitchen knives then went to work on the Sharpmaker to get them to hair popping sharpness. My wife asked if I was going to go through her knife drawer and sharpen all of her knives???
Here is what it looks like...