First off welcome to the forum. And congratulations for making a BIG splash with your first post ! My take is that you have a rather complex project here. Can I assume that you have a Tripoli or NAR Level 2 certification ? You'd need that to fly a J motor. Are you a member of the club ? How much lead time did you give the club launch crew about this puppy ? Or did you just show up on launch day with a rocket and smile. A little heads up during design and construction may have mitigated some of the concern. Some documentation of the build is a good thing to bring when you have a project of this nature. Like most other posters here I say the screws are the least of my concerns as we've all flown rockets that used them. Love to see some pictures if you care to post any.
I assure you I didn't just arrive naively with a crazy "death rocket". I've been showing up to the club for about 2 years now. Building on this project slowly. I started with a small 24 mm motor with and modified a kit to represent nearly the same size and shape of the final rocket. That rocket is very light weight. Then I moved to 38 mm motors and was successful again. Parts of that rocket were 3D printed and weighted about 3 pounds with the motor and ballast. By then I had already gotten my NAR level 2 at the club with a kit rocket using the same 38 mm motors. And finally I moved to 54 mm motors and an 8 pound rocket with varying levels of success. With the same size and shape, that rocket has flown twice, is stable and achieved the expected altitude. The first flight had a failed deployment and the second flight experienced damage (zippering) during deployment. So I was trying to get past those deficiencies in the next version which is where I'm currently stuck. I have always showed up with rocket simulation results using the motors I want to fly with so I can remove the experimental aspects as much as possible. The good news is that the simulations match the altimeter very closely which I am happy to report. So it seems the rocket has a good path forward, but perhaps, not with this club.