OTTB eventing transition?

I am going to look for a sound Thoroughbred at the track soon for eventing. How long did it take you to transition your OTTB from the track, and how long was it before the horse's first event(prior to leaving the track)? How long was it before the horse calmed down? How did you transition him/her? I think I'll keep mine in a paddock beside the main pasture until he's ready to join the herd, then turn him out until he get the track out of him(so to speak) and once he's mellowed out a bit I'll start work in the round pen and slowly progress to ring work(dressage). I'll do some jump training once he's got his flat down, and just keep going from there. I can school at a cross country course that's very close. I know it will all depend on my horse but I'm looking for an average to base my estimated time on. Thanks for all help! No rude answers please!