Marco knows what he's doing. The results will be proven on an actual engine
dyno, which I know he is putting together or has already. Four-hole modern
injectors DO make a few more ponies through better atomization. I've been
running them a couple years, before he started offering them. I'm sure he will
show the proof on the dyno for the ratio rockers as well. But -
No mention of his complete new, modern FI / ignition system to replace the
antiquated originals? His turbo system that has been tested and proven, 150 hp
as  starting point? Everything he is building is top-shelf, tested, and
worthwhile IMO. IIRC, he is/was a master tech with a Porsche racing team.
Have you seen the dyno test videos of two of his 2.1 wbx turbo drag race
engines? :)