Hello, The Allan head counter sunk use a too small key for me. In my racing days standard 2 BA cap screws where used without a clutch cover, just a guard to keep the boots clear.
Have found that slotted head stainsteel screws are less prone to backing out, perhaps due to galling under the head. This with home made stainless spring retainer. John.
Have found that slotted head stainsteel screws are less prone to backing out, perhaps due to galling under the head. This with home made stainless spring retainer. John.