Has anyone any experience of making these? We are hoping to build one to get the girls fit (in the absence of rabbits c/o myxymotosis  :(    ) prior to the coursing season. have all the component parts (we think) but want a different starter motor as the one we have doesnt have a very long shaft. I know in usa they use old 1961 ford parts but not too many of those around here :)  Any suggestions welcomed