Hi Spindizzy,
Not trying to be "picky" or anything but believe guys would like
a further look at your "grey hub" mentioned. and me too!
You say centrifugal force causes the blades to go straight from
the rotor post, as I understand.
The grey hub does appear to be of delta character.
The blades are attached with one bolt, free to swivel.
Initially the blades are aligned with the delta tang.
If you would raise them the delta would create negatve incidence
or less than what ever the incidence was before raising.
Now when centrifugal comes into effect the blades no longer
align with with the tang. They are swept back relative to the tang
and supposedly aligned as if there was no delta.
One would have to "play" with the set up to find what results
from this. Would believe there would be some delta effect?
Would that effect be the same as it would be with the blades
aligned to the tang? Or would something weird happen?
Of note> it is possible to have fixed instead of swivel attachment
and get the same action with a strike.
Simply lengthen the tang and add a second PLASTIC screw.
The plastic will shear with a strike while holding the blade solidly
onto the tang otherwise.
Perhaps a better arrangement with heavier more powerful craft.
Good luck and remember> always fly at leasr two mistakes high!

Hal