PDF and IGS file attached. You need to reduce the dimension of the core section by .010&quot; to allow several turns of metal tape wrapped to hold the assembly together. First we have to decide on what metal tape to use. I'm thinking to bond the start of the tape to the side of the H core, wind 3 or 4 turns and bond the end to finish. This operation will be done at low RPM on a coil winding machine with a fair amount of tension on the tape, possibly with a rubber (or acetyl) wheel pressing onto the tape to flatten and compress it. 