i prob have the heaviest motor of anyone on a 23-a 250 verado (chipped to a 275 now). About 650 lbs. The scuppers on my rig were done by prior owner exactly as Chuck says to the letter. It is only wet if 2 guys are in the back corner, and one of the guys is over 250 pounds. Case in point, me at 175ish with an equal sized fellow this weekend,full gas,50lbs ice,gear, we had dry feet. AT rest. Both in the corner, and we tested that on purpose actually

. We were talking about it in fact.
If the floor was raised a little it would be perfect, but unless i need to do the floor its not gonna happen for a few more years at least. Even then I may keep the floor at its current height, since I may not totally remove the floor to redo.
At rest the boat is self bailing right now, and its an Armstrong bracket for a 25" motor. I think the hermcos prob have a little more float but thats conjecture on my part. If i had a dream bracket it would be the hermco, with more floatation going outward than exist today. You dont need a dive ladder to get back on the brackets, and only need room for tabs.
I have the rubber flaps, they do let some water in if my fishing bud is north of 250 and we are both in corner. I prefer the flaps as i think in a pinch they would evacuate more water that than the ping pong ball types, but thats preference. IMO less to go wrong with the flaps, i dont want to think about my scuppers and ping pong balls if a wave comes over, just want them to work. HOwever if raising the floor say another inch or 2, Id go with real big scuppers like the rectangle style with flaps. Again overkill, but i do know someone who took a rogue wave offshore in their classic 23 with scuppers out the back, and bigger is better for scuppers.