Remember if the front of the boat is lifting from the sponsons top angle not being correct. It will plant the ass end.
The top of the front sponson has a lot to do with how the boat balances.
Forget about the bottom it is what it is. If it is not right or you want to change it get a new sponson made.
When the boat gets to speed with the high rake prop it will shift the balance to the back. with a slight nose down on the sponson it will shift it forward.
The boat is like a teeter totter it will move where pressure is applied.
With some tips down and just a small strut change you will find the sweet spot.
Just don't over do one or the other a little bit will do it.
start from scratch....tub level sponson tips down 1 deg strut on table with 1.5 deg in it.
Strut angle is a adjustment for the differences in props.
If you think you don't need to adjust the strut angle and height with different props you are lost........................Time to find some thing new to play with.
David my boat is fine without those props , done all that you have said , am playing with different props , I run out of ideas for making those props work cant say i tried , i have wasted alot of time an gone backwards with boat handling not speed . but give it time I will stew it over in my mind for a while an maybe come back an revise , the universe goes in cycles maybe next cycle it will work