First off, great job - that's good skiing for just getting consistent with deep water starts.
I spent my first 12 years of slalom skiing behind various I/O's, and that while your wake may not be ski boat quality, it looks decent for the situation. I'd echo @Martin1980 on shortening the rope to 60' since it looks like the wake is a little smaller up closer, but it's also narrower. Once you get to cutting a bit harder, the wake will feel more like one bump vs. 2 if you find a narrower crossing point.
As far as technique, the one thing I'd say to work on is trying to keep your cut consistent as you cross the wake. No doubt the wake will shake you a bit, but when you lay off your cut coming into the wake, not only is your ski flatter to hit the wake with, your also slowing down, which messes with your balance. In your case, instead of cutting out so far, go out half that far, and focus on consistent (maybe slower to start) cuts all the way through.
The smart tabs piece intrigues me. My cousin has a similar era Bayliner I/O with them (oversized), and it looks like a ski boat driving around at 25 mph or so, but has the weirdest wake I've ever seen. I'm curious to take it out with just 2 people and see what it looks like at 30+ now.