"drilling holes in it scares the crap out of me"
I hear ya. To avoid the holes, I mounted mine inboard on my stainless steel handrails. Obviously, you don't need the handrails to do this.... This also keeps the bimini hoops off the top of the gel coat.
I'm currently running a generic 8' top that I also cut down. It has the wrap-around sides that drop down a bit. Not as good-looking as a "flat" top, but it really helps keep the sun off early and late in the day. And mounting it as low as you're comfortable with (consider your back and the "stoop" factor) will maximize its effectiveness in keeping the sun off - again, especially early and late in the day.
Good luck