Just to clarify…
My point was that Merlin are unlikely to be despatching trains more quickly than 1 per minute, unless they have a separate offload station.
The time from Despatch to brakes is around a minute, so the earliest they can despatch another train would be 1 minute (when the previous train hits the brake block.)
Of course, if they use the lift as a block, which is likely, they ‘can’ despatch earlier, but as pointed out already by myself and others, they’re unlikely to achieve that as it would mean sub 60 second despatches, and it’s ‘Merlin.’
Therefore, without an offload station to speed up despatches then more trains or blocks (on this layout, since a mid course doesn’t look possible) would just lead to more stacking, not higher throughput.
Hope that makes more sense.