Btw. one of their images shows roughly what you probably get there. 10W from two diodes (another image) if I read this image correctly. Given the little heat sink it will probably not last that long even with two fans.
I thought about it. You could actually get this somehow working. Put the SM2 on a table and the tube below it facing up. Drill a hole through the table and SM base plate to let the laser beam pass along the linear modul of the z axis. Install a mirror at the x rail itself and a second one on the carrier together with a focus lens. It is basically like the K40 cutter but 90° rotated along the x axis. Other orientations of the tube are possible with an additional mirror.
