The size of the bag on the back seat of Mr. Frazier's car is an issue. Mr. Frazier said he glanced at it for brief second and estimated it a 2ft possibly slightly bigger. The MC disassembled can be no shorter than 3ft. It is entirely possible that Mr. Frazier was incorrect with his estimation. In relation to times Mr.Frazier gives approximations, often giving quite wide variations.
If the bag did contain curtain rods, why where they not found in the TSBD. Oswald wasn't getting a lift home from Mr.Frazier that day and that's the reason why Oswald carried the " curtain rods" into the TSBD. So what happened to the curtain rods. Perhaps somebody nicked them....half inched them.