After much online research (search the forums on iboats.com), and Boatster's experience adding Nauticus Smart Tabs to his 4M Searider, I picked up a set on eBay for my 5.4M Searider. These are the self adjusting type you're speaking of. I fitted them prior to my first time using the boat, so I have no comparison, but I can attest to the fact that there is literally 0 bow lift and the boat jumps up onto the plane immediately. This is with myself, my wife and my 5 year old all seated on the standard jockey seat. You merely feel the boat accelerate as the ballast drains. I was very impressed. I am also able to keep the boat planing at what seemed to be a fairly low speed. BTW, Boatster is a huge convert, I recall seeing his posts on iboats railing against the Smart Tabs, now he loves them!
I want to experiment with the settings a bit and with them fully retracted as if they weren't there, but it's a low priority as my sailboat is to be launched on May 12th, with much to be done, plus my wife has all sorts of work for me to do in the garden!
And I really need to clean and rebuild the carbs so the outboard will idle properly!
I read many negative things about doel fins, and removed the one that came with my outboard, in favor of the Smart Tabs. No offense to anyone opposed to adding tabs, but I really don't see any negatives, only benefits, So what's the problem? It was $90 well spent in my opinion.