I have the M5 with the 2277 and am at about 42mph WOT.

Skiers Pier was an independently owned Malibu dealership in Waterford, MI.

Tommys bought them out in 2018 IIRC.

Good question. In my searching I see lots of folks so excited that Tommys bought them and how good that will be for years to come.  
 

The similar issue to Tommy’s I recall was Bridge City Marine.  Anyone know what that guy ended up getting for penalties?  

3 hours ago, MikeR397 said:

In case anyone is wondering, 43mph seems the top speed in a T220 with m6 and a standard 2257 (iirc the number) prop. Pretty much right where I expected it. The wake hull’s drag get exponential above 35 and even the LT4 doesn’t seem to add more than 7mph to this number (if it was available in a T220). 

Your numbers sound like plenty of performance to me. Folks with LT4 have reported 50mph I think even in larger 23 or 24ft boats; the 1.5:1 transmission is a big difference.

Tho it's all kinda irrelevant in my book as theres no need to be breaking 40mph in a surf boat anyway

A lot of new surfers are looking for a pocket on the wave, where they don’t have to do much but stand there. I learned to surf in 2017 on a broadcast. And we were looking for a sweet spot. I carry a broadcast on my own boat to teach people on. But I can’t ride it anymore it’s too slow, I fall off the wave every time on it. My point being some boards are slow. My next suggestion to you is to move your front foot forward and move both of your feet more toeside especially the front foot. Being too much heel side (which most of us learned from wakeboarding and snowboarding) pulls you out and off the wave. At least for me foot position is very critical but I do move my feet around the board quite a bit when I am surfing. 
Cheers! I hope you get it figured out.  I learned to surf on a 2017 A22 and we did it with no rear plug and play…