Paul;
It's one of the designs I looked at a while ago, but decided on just biting the bullet and ordering the Hemingway Worden kit plus almost all of the attachment kits.
The Worden does have its' quirks, but all in all is a pleasure to have. The kit, with the pre-punched and engraved bits and pieces, and the right materials sourced and sorted, plus Kirk Burwell's excellent plans, was a pleasure to make.
Now, my focus is on building locomotives and in CNC so taking as little time as required was a goal on my part.
I do have some pics of Worden bits I've machined on my CNC blog – if you are at all interested **LINK** should get you most of the articles; maybe the Hemingway Roll kit might show up too.
It's all fun stuff – whatever you end up doing, tell us. John.