I have another build going along with the GP35M. I bought the dynamic brake insert and Kadees to make it look better. This is an unpowered unit for my static model train collection. So far I have the dynamic brakes and Kadees added and the shell painted up for Conrail 3307, the decals aren't done yet.
The next one in the planning stage is this gem, Blue Box U33-B. It will be a Guilford B&M unit, BM190. I need rails but lucked out and found a shell on ebay with rails.