Prima is about 3.5 years old, I think. I really have no idea about the internals of the Prima. Bought brand new. I think this is the one on the Dingwall site.
The Z was ordered about mid 2016 and took about 15 months to make. For logistics reasons I couldn't get my hands on it for a good 6 months after completion. FD3 and glock. I had another Z3. A used one. It was great but I just couldn't resist getting a brand new one because I wanted a natural grain look. having no bass in green, I decided to order this in green burst.
As you mentioned there are other great luthiers but Dingwall stands out along with a handful of others because of their professionalism. Luthiers seem to be more artists than professionals and that can create problems in delivery time, consistent quality, and overall demeanor. I recommend custom Dingwall to others when they want to take all the BS out of the equation. You figure out the build, pay, and just wait. It comes perfect to your door step. This is rare when you deal with artists. Is it expensive? Depends. I personally can't deal with something needing a setup upon delivery so I don't think it's all that expensive. I just want to plug it in, tune it up and play. Dingwall checks all the boxes for me.
Gotcha. Not too bad of a wait time. My SJ was 13-14 in 2015. And my current wait is probably 18(I’m at 13). When I put this last order in I thought, “just do it. I wanted to receive this before I turn 40 and if I wait any longer there is a chance it’s just not gonna happen.”
Fortunately destiny put my used Zs in my hands when it did.