I was in this position ... thinking about fitting a foil ... glad I didn't.
Drilling holes in anti-cavitation plate not a good idea & would invalidate warranty ( was an issue for me)
Plus puts a lot of extra load on drive .
The answer for me was SMART TABS ............ it made my boat a completely different experience, no bow rise, comes on plane much faster. will stay on plane at lower speed, stays stable in beam-on seas or wind.
It was the BEST investment I made in my Maxum .... 2nd best was fitting a High5 prop, and for less than the cost of a tank of fuel.
I wrote this up if you want to know more ...