I made the rod in the center for a OS H-80 engine. I use a program called Mastercam and a CNC milling machine to cut out the rod.

I used 7075 and bushed the small end with bronze. The large end uses a needle bearing.

With out a CNC machine it's going to be tough.

Here a link to the thread. http://www.rcuniverse.com/forum/m_72...tm.htm#7273524