thanx to your idea was able to be back airbourne today!
I had bought an xtra set of blades to use the balls for the CAed double swash ball xtension,tried and failed,although if i was to do it again, think i would get it!
So I had extra blade screws,and to elaborate on your idea,since my upper swash part was ball less, used the marks for hole guides insuring 180°,
and the distance from the top and bottom was the same as well.
With a candle and super small needle melted screw start hole, and after insuring screws were equal distance out,up, down, angle, thick CAed in place.
Had to much play with the links so dipped just the head in thin CA, got lucky,almost perfect play!
I had a feeling this was "THE MCX MOD" now I know!
BIG THANX JOHN!