Wow excellent work! I hope that you got paid well for that job because the OEM versions of those types of screws are extremely pricey! Pretty impressive that you pulled that off so quickly. I made a few similar screws for a powder filler (cheese powder) 2 years ago and had nearly an identical set-up to yours to deal with the flex. It was a total fingers crossed type job for me because I really didn't know how well I could hold the tolerances in the unsupported areas.