I have a Bestop Safari top. Going on 6 years with it. No drill header. I can never get those top corners tucked in all the way either. They have never come out though.
Bestop also gives you the choice of velcro around the sport bar, or a channel for the door surrounds. I usually use the surrounds. They make the top fit tighter, and I can seal out more of the elements up front by using my uppers.
But, I like how PiePuncher's Smitty top uses the straps to hold the rear of the top tight. Looks like they would help keep the rear from flapping, like my Bestop used to. Now, I use tarp clips and zip tie them to my rear spreader bar I added to the cage.
Here's the Bestop Safari using sport bar velcro, and door surrounds.