Hi - I don't think I can help you much with your questions, but I know for sure that the original cross-bars for the railings are expensive - but on the other hand they will make your tak-boks much lower than for instance Thule-bars.
But - I'm interested in your solution regarding the insufficent recline of the rear middel seat. The default position is really strange and irritating, but applying brute force - do you mean real brute force or just a little? This sounds like an irreversible process, and it's actually based on the fact that something must be "destroyed" during the process? Have you done this yourself, and what' the risk for the seat to go flat for ever? Do you really recommend this solution?