I think we need to look at the issue this way. Is our mission to replicate the WW&F exclusively, or carry the WW&F banner while also recognizing and preserving Maine NG railroading overall. If we are to be WW&F only, then why do we have 67, 51, 52, 10, etc. as they are not WW&F equipment?
I would think that Harry would approve of the bigger picture of preserving all Maine equipment regardless of heritage but noting that the WW&F is now home. With that in mind, I would not look favorably at re-designating #67 to WW&F. It's a B&SR car and should be recognized as such. Maybe we could have it in the grey scheme for 3-4 years and then switch to the red scheme for another 3-4 years and have some variety as both schemes are prototypical.
OK, now stepping off my soapbox.............