Bill used a 5/16 -14 acme thread some times. It has a square thread instead of pointed thread. Do a google search on acme threads you will see the difference. The two won't fit even though they are 5/16-14.
I DID'NT HAVE A DISTANCE ISSUE. I TOLD THE DR. I PLAYED POOL AND HE TUNED ME IN. THE Rx IS HALF OF WHAT MY READING GLASSES ARE. I SEE GREAT ALL AROUND WITHOUT THE HASSLE OF PUTTING GLASSES ON AND OFF. THE OTHER PLUS IS YOUR EYES DON'T HAVE TO KEEP ADJUSTING TO GLASSES ON FOR THIS AND GLASSES OFF...
I use gorilla ca gel $5.00 @ walmartand insta-set accelerator from my local rc car/plane hobby shop. I square the ferrule and rough it a little with some 100 grit. Then i sand the back of the tip with 80 grit. Apply the glue to the ferrule and smear it around with the tip. Center the tip and...