REFLECTOR:cowling screws.

[Scott Derrick]

Having beat up my prop a few times from cowl screws and washers coming 
loose in flight I'd like to install some type of captured fastener.

But our cowls aren't like the spam can cowls.  The forward edge of the 
top and bottom cowl slide under a lip connected to the fuselage and the 
rear sections of the top  and bottom cowl on mine slide together.

This requires fasteners that retract all the way out but stay captured. 
  Make sense?

Somebody must have done this by now.  How did you do it?

Any pictures?  Type of fastener?

Scott