Yes, he did a very nice job & has over 900 hours of build time in this prototype display. He's building 6 kits for RC conversion & has 3 spoken for; Dave Merriman is working on a 6" low pressure ballast system with fore & aft tanks that will have the same dive characteristics of the actual boat.
Stay tuned... plans are already in the works to build a u-flotilla in 1/25 scale: Type IIa, VIIc, VIId, IXc & XXI.