Cranks to replace Marvin cranks - and that interfere with blinds

A home owner from Glen Rock, NJ says:
September 23, 2019
I saw your answer to a similar question here:
https://www.swisco.com/discussions/Marvin-Casemaster-window-crank-_-cover-PN-10898270-77-71144

But - the original poster never responded to indicate if any of the suggested part actually worked.

So while it looks like the 39-107 cover should work and so should either of the 39-114L or 39-205 handles, I'd also like to ask if you think I could just use a 39-107FK instead or if you'd have any concerns about that.

Thanks very much for any help.
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Bob from SWISCO responded:
September 30, 2019

Thanks for writing in. Check that your spline's diameter is 11/32". If so, the 39-107FK should certainly work fine for you. Keep in mind this has a built-in handle; you don't need to buy a separate one.
Truth Folding Handle And Cover Kit
Truth Folding Handle And Cover Kit
39-107FK
$15.45
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