Yeah as you can see the cap screws are the way to go!
When I first got that heli it was in terrible shape. It had about 9 screws (button heads) stripped. Had end up carefully grinding the heads off em to get em out! Was a pain! Now I put cap screws everywhere I can! I have some button heads I need to get after and replace on my 450 pro when I get time. It's easy to find what size ya need by looking in the manual, then just do a search on eBay or google. Lots of venders sell plenty of sizes to fit.