Every set of repro blaster cylinders I've seen has 2 central "fuses" but I think maybe there were actually 3 on the screen-used E11s.
This photo of a 6-rack of the E11-used "mystery valves" on a mouse droid clearly shows 3 central "fuses". I doubt the Bapty dressers would have taken the time to remove the 3rd one & I can't think of a reason why they would need to.
I imagine someone has suggested this idea before & it has been disproved with material evidence but, to my knowledge, there isn't a clear enough photo of the original blasters to be sure.
Has anyone any thoughts before I start making cylinder units with 3 fuses for my Sterling build and scratch builds?