Peter,
you certainly are putting Silver Efex through its paces
The first one is very nice with the path leading to the OH. Only little nit would be to just crop a bit off the top, would remove the bright spot in upper right.
Good capture on the second one and great to have the ferry in there as well.
Last one, well, it's a OH photo, doesn't do much for me, sorry.
Have you tried actually putting in a bit of grain on the B&W conversions, just curious?
Cheers,
André