Neville's big problem with all of the Backwoods kits concerns wheels, as the original maker/supplier of the mostly plastic-centred, fine-profile wheelsets no longer exists.
From the one loco kit that has been re-released, it looks like the old-style coarse profile "steamroller" wheels - inherited from N-gauge in the 1980s and earlier - are now being used, so this retrograde step is likely to find its way into all of the kits over the next decade or so. Backwoods kits are going to look a bit odd with them, given that a big selling point was the fact that the running gear didn't look prehistoric.