I know there were some issues with the early OMARK bolt head retaining pins requiring them to be replaced with larger dia pins for safety.
My Angel bolt has a small diameter pin and I'm wondering if they too were subject to problems and should be upgraded, or is all well and I can leave it as is.
(My pin looks standard and has one large end and one small end).
Hoping Bill Angel is on this forum

Cheers,
Gerard.