I just bought back the Starduster Too that I built in 1989 with an 0-320 installed (and just joined this forum). The rubber engine mounts are cracking and I want to replace them, among many other things that the plane needs. What is recommended these days for mount sets when mild aerobatics may be done? I heard someone comment on urethane mounts but can't seem to find a source. If anyone has a part number and source I would appreciate the info. Thanks for your help.