Bah bah the sweet subject of grill!
Looks like we have some grill masters around here. ZA jan, one thing that might be a little difficult to get though is the 22% fat ratio. There are plently of conventional meat to fat ratios like 80% to 20%, 85% to 15%, 90% to 10% or even 95% to 5% but I don't remember seeing 78% to 22%.
I am now very motivated to put your recipe in a good use this weekend.
One thing I should mention about kiwi is be careful not to overuse it. It can over tenderize your meat, specially on chicken.