I didn't realize there were flight worthy Shuttle SRB's left, I'd thought everything had been repurposed for SLS by now (i.e. steel cases). What were the showstoppers preventing that set of boosters plus ET-94 from being used for an STS-136? (Presumably with Endeavour?)
In any case I am going to LA and will pay another visit to Endeavour when this exhibit opens (2018? 2019?).