ASW20L extentions with winglets?

In relation to the ASW20L extensions , do you know
of anyone having the extensions with winglets on or perhaps shortening
them to where the extended control surface ends and
putting winglets on to compensate
I would think that would boost the LD to 44-45 plus give the handling
improvements with winglets,
The reason I think it could work well is the 20 wingtips are big broad
paddles at the end and the tendency is for that type of wingtip to get the
most benefit from the conversion.
Gary O'Neill
New Zealand
ASW20L
ZK-GZE