The Leo I had I used The dowel that came with it. It had two rods wrapped with string and epoxy, you know the typical two to one set up.
It seems to be very stiff no slack. I wasn't concerned abbout the weight because I put my YS140 in it because I didn't have a 110 engine. It should be fibe don't you think? It's just a practice plane until I finish the Black Magic.