i have had a number of subs , the OTW type 7c, the OTW Vanguard, the Robbe U47 as a dynamic diver and then acquired an Engel Lafayette. I sold them all and built a 1/12 Seven lifeboat and sold that. I have just ordered an Engel Type 7c which I am waiting on its arrival. All the slots now are pre cut. The Engel Lafayette was excellent to sail in fact you could fly it. My OTW type 7c I eventually built the later conning tower with the two decks for additional AA guns. The only problem was it was always in bits with WTC problems, the Vanguard performed well. Looking forward to getting my Engel Type 7c. Having been involved with lifeboat building I have to comment on the passionate nature of all the lifeboat guys. I don't see the same degree of enthusiasm from submarine builders 😂😂 I don't understand why? 😩