[8D] Thats a good point abufletcher, and at the risk of being stereotyped as an air conditioned, chair sitting, coffee sipper by Sigrun...... weren't the Germans also doing wind tunnel and aerodynamic testing on models of various Aircraft? I believe if you research it you'll find they were.....and albeit a primitive attempt at making improvements, I'm sure some of their discoveries there influnced some design decisions. Now I'm not saying I know for sure that this inspired rounded wingtips any more than the practical field reasons cited above, which seem very logical and probable as well.....but then none of us know for sure!......never will.

ZZ.