Well, I thought I might as well update this thread as I build it IRL:
During the digital design process, I seemingly could only find pictures of the real locomotive from one side/orientation. It was only after I started building IRL and spending more time looking at more pictures did I realize that both sides, were the same. I had assumed the locomotive was symmetric across its length, but this was ultimately not the case. I mean, why would I assume otherwise...
I'll have to paint the LBG wedge plates blue very shortly. I hope I'll be able to find a blue paint that matches TLG's blue close enough.