Rich,
Mackenzie's sketch of RM West (the only one believed to be in existence) is below
Mackenzie's original plan was revised significantly by Russell and Morcom, who produced 2 later plans (which included rerouting Mackenzie's last three holes and addition of the 10th hole).
The hard edging of bunkering was already a feature but it appears that Mackenzie's knowledge infused in Morcom's construction a greater extravagance, both in terms of scale and flashing of the faces.
Mackenzie supervised the commencement of construction of the 5th hole:
Compare with 14th hole on Sandringham course:
Below is the plan for Kingston Heath which appeared in the Herald newspaper in 1927. It's my belief that this plan was drawn by Vern Morcom and is likely a facsimile of the plan upon which the bunkering plan was implemented.
Interestingly, I was at a historian's forum at Kingston Heath a few weeks ago and one of the members of their history committee said that the Morcoms made it a precondition of their construction of the bunkering scheme that they had licence not to follow Mackenzie's exact plan. Aerials of the course between 1931 and 1945 show that the style of bunkering at KH changed. It's my guess the bunkers were originally built on a scale similar to RM but Vern Morcom realised over time that the scale was not suited to KH's flatter topography and he modified the bunkering to create clusters of three or four bunkers where previously there was only one large bunker. Compare holes 1, 4, 5 and 6 below:
and 8, 16, 17: