"200w kit" he bought "panels" for most likely means two 100 watt panels if my detective skills are on today. These are small'ish compared to the big 350's. A 100 watt panel does not need an abundance of screws. 4 will likely be enough. 8 is plenty and more than 8 per panel is over-kill. You do not need to mount them a foot high as the other pic, that will just really cause wind issues. Mine are less than 1/2 inch off the roof, more than 1/4, but it just needs enough to let air move, and 1/4 inch will do that.
I bought aluminum angle iron from hardware store, cut it to fit the short sides of the panels, used self-tapping screws to hold it to the panels and mounted the brackets to the roof. 4 screws for one 100 watt panel and 4 screws to hold it to the roof (mins was actually a metal roof so used double sided tape, two 4 inch strips per bracket was plenty.