I would think that if you position it so it is flush with the lower section of the hull, there will always be an exposed portion at the higher step so there will always be lift generated by this section even if you fully retract the blade. This would not be good for high speed trimming and if you want to get the bow up in certain sea conditions / speeds . Do they offer a short length that you can position only over all of the outermost portion of the hull? This is where you want them for heel adjustment anyway. If a small portion of the inboard end is behind the lower step in the hull, this will just be ineffective for most of the stroke of the blade ( maybe all) but the rest of the exposed length may still provide you with plenty enough lift for a given speed range.
I think there are some others who have installed these on 20's so might be able to find them with a search and get their input before you jump at the QL's and put the hole in the transom for the connector.
Can you "elegantly" notch the bracket platform for a standard Bennett or Lenco set? Maybe the appearance is not what you were after not to mention paint patch-work?
Will be interested in how it turns out as I will have the same issue ( that is if I can ever get to finishing my project).
Brian
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