Personally, I think we might be ascribing too much complexity to the process that got us where we are re: power steering. Any substantive change like that is going to retroactively diddle with whatever accuracy got imparted on the process but I don't *think* there's been an active resistance to that allowance for that reason.

It's simpler than that: There's been no compelling reason made for the allowance, that would balance out the incremental issues associated with rules creep. ITAC members, like the membership at large, differ on lots of things but that's one aspect of the IT rule set that seems to have consistent, consensus support from the committee - leave stuff alone unless there's a REALLY good reason to make a change.

The within-line update/backdate opportunity for some IT cars is an accident of history. And if there was a compelling case made for the SM allowance, I don't know what it was. I tend to think it was probably more like, "real race cars don't have power steering..."

K