Gary was there any problems with your blue case 6.4 twins with the c/h shielded plug caps and the smaller plugs and adapters . I seemed to have heard a few years back when i got mine blue cased 6.4 that someone told me that there was some heat issues on the smaller plugs i really cant remember the details . I love my 6.4 it might not be the most lite twin but for my needs it hooks up good running a 27/10 NX prop.