Congratulations! I used to live in Coopersburg and know the golf course well. Many years ago, I put together a preliminary renovation plan for the course and know its history well. They just never had the funding to make even modest changes/improvements. I have a copy of the original “Ross” drawing (I saw Joe posted a copy). Ross was never believed to have been on site, typical for about a third of his designs which many people call his “topo” courses. Last I was there, I believe only three bunkers remained (the original plan called for about ten).
I expect the end product will turn out great and nine of the holes might follow the original Ross plan but I think all parties will admit this is going to be a renovation “in the spirit of Ross” vs a pure restoration. Not all designs (even from someone like Donald Ross) who had so much variety in the quality of his courses, deserve to be "restored". Tumblebrook is not an Inverness or Oak Hill, however, the completed course should do very well in the area especially with the loss of Locust Valley. I was actually just at the Locust Valley site yesterday. I learned to play there. It is sad seeing it gone. Ironically my oldest sister is building a home on what was the fairway of the one par five. It is now a 55+ community. Congratulations to VH and his team for saving Tumblebrook from a similar fate. Best of luck with the project!!