Yes, it's a 1:1 replacement in technical terms, but with expansion, and fleet deferrment, I don't see a 1:1 Transfer ratio for the fleet. If that were the case, then for every XN40 coming into HTC, an equal amount of D40LF's would be going to STC, but that hasn't been the case, it's closer to 1:2, hence where my predictions come from. There's going to be service improvements for many routes, and given BTC's depot limit, I can only imagine that they'll have to move out routes to improve service on many Artic routes. More Artics = 1.5x less 40 footers. With the loss of 40 footers (with earlier speculation that Nova's are going to STC), BTC will have to move routes to HTC in order to allow expansion of Articulated serviced routes.