Dieter
I have just been reading your mammoth post. In answer to 'LaPalas' comment about our (Australian) fixation with banana lures, this probably has more to do with the main fish being targeted, ie, Murray Cod, which like slow, wide, loud lure action. I have had several attempts at making a lure similar to your 'banana' over the years, but have always found, as with 'Flatfish', they are really speed sensitive and hard to tune - love your work and tenacity in keeping at it, these, for me anyway, are the hardest lures to get anywhere near right.
Here is another famous/legendary lure of this type, I found a couple in the shed, they come in sizes from about 70mm to 200mm and dives to about 30', they shake so hard/. p, you can nearly hear them coming.pete