dendweller
Well-known member
I had a mcdermott defy with a 3/8 10. Was so hard to get it to thread when it was new I thought I was going to mess it up. Called Seyberts, they told me to use chapstick to lube it up.3/8-10 is 3/8-10 the difference is the thread pitch I have made custom pin work just fine on regular threads, now Im pretty sure it would be real tight using a regular 3/8-10 pin on modified custom 3/8-10 pin but should still work with some elbow grease, Cynergy shafts also have a softer joint threading material so it should adapt its self after awhile. Now redo's on the other had have a real hard joint thread material, it can even chip. IMHO the chap stick trick is worth the try.