I've been following your progress
and have some idle thoughts which are not strictly prototypical for Moor St.....
Could you not extend the kickback siding (towards the camera) to join up with the turntable? This would give a bit more flexibility when operating the layout with friends especially if there is only one point at the station throat from the 'main line'. One operating the 'main line' and another 'switching/shunting' the goods and engine shed with deliveries e.g. the odd wagon and van.
It would also dispense the need for a 'scenic' wall twixt turntable and carriage sidings thereby incorporating the turntable within the entire scenic section. Selective placement of loco depot related buildings e.g. mess hut etc and a small service building for carriage cleaners, etc would ensure the each scenic area is a diorama in it's own right without appearing disjointed and detracting from the overall Moor St ambience.
Or... have a double slip instead of the Y point in front of the loco and join this with the turntable giving direct access from the loco release road!
PS - I would have expected the coaster to be in French! Modèle Chemin de Fer - temps pour Dubonnet - Naturellement