Wow That is a new setup i've never seen before. Don't know what they were thinking for that. As far as ratchets go not really sure what to think, but for a beginer for landboarding you want to say see ya to the board when you don't feel right (boosting) When you just cruise it doesn't matter quite so much and ratchets would help take the extra strain off your front shin muscle. Pm or give Undergroundkitesports a shout. I know for a fact he has some sweet new scrub bindings that need to be gotten rid of problably around 50$ or less i'm guessing. Take a look at the weldngod's aluminum ground board those are the binding's i'm talking about.
You'll need to do your own retrofitting when you get them. A few extra holes won't add any stress to that solid board. It looks like to me to mount them in the 4 dot area on your board. put them at a duck pattern like you got there. Have a helper hold the new bindings about where you stand and make sure its symetrical on both sides. Mark your hole and drill it, screw it, and your done.
I'm thinking about putting a handle in the middle for grab tricks.

I love the wind and I love getting HIGH on air.