Wow $250 bucks, I didn't go that long ago and it was about $180 IIRC....another revenue stream that place is.
I would NOT be hiding any turbo timer or boost controller under the dash area, because that was one of first places the inspector went feeling around under there on mine. Best policy is to get rid of it completely. They aren't as dumb as some people think and they inspect turbo cars all day every day...
Luckily my turbo timer was integrated in to the alarm so I just disabled it and I didn't have a boost controller either.
Good luck with it Carmikey to getting it through first go