ULA bracket simple design

This is my fifth version and second uploaded version for the project. The aim was to reduce the weight as much as possible at the same time keeping the stress with in the required limits (4500 PSI). The bracket size is within the required limits. Minimum wall thickness is more than 0.04 inches Minimum distance surrounding bolt holes are at least twice the size of the diameter of the hole. Material ULTEM 9085 with a density of 0.048411lbs/cubic inches The bracket total volume is 0.866236 cubic inches Mass = 0.048411* 0.866236 = 0.0419 Lbs. Testing with 600 lbs force on Datum B surface (-z direction) resulted in 4074.8 Psi Testing with 650 lbs force on Datum B surface (-z direction) resulted in 4414.4 Psi