Mach 3 F4 Phantom Jun 19, 2015 16:33:47 GMT 12 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by baz62 on Jun 19, 2015 16:33:47 GMT 12 Yep there was a study and a project to modify the F4 to do Mach 3 Click HERE