I have noticed that Kebab Shop recipes vary considerably, even in the same shop! The one I created for home was simply to compare components of Indian cuisine with the Kebab shop chicken shish and in my opinion is pretty close to the mark.
The marinade can be thinned out by adding more lemon juice but I tend not to do this as I only usually marinate now for about an hour.
It's become a staple in our household now, i'd love some feed back on it if you try it.