Have to say I'm much impressed with your model on 2751
I sailed on her many times when she was stationed at RAF Mountbatten in Plymouth. She was being used back in 1973/4 era as a testbed for the refurbished Sea Griffons which were rolling off the RAF's production line in Plymouth. At the time i was crew on one of her sister craft, 2757, and her crew regularly used to get detailed to take 2751 out on a test run as '51 didnt have an official crew. After the engines had been tested and approved they would be removed, inhibited and placed in storage in case they were needed for any of the RTTL's still in service both at home and abroad. At that time the Marine Branch were still operating RTTL's in Gibraltar, Malta, Cyprus and Gan in the Maldive's. In all i served on RTTL's 2751, 2752, 2753, 2754 and 2757.
Someone asked where the Larne Targets were stowed when not in use - either side of the winch house was the usual stowage. The handrail was very handing for lashing the target securely. Two were usually carried, if an extra was to be taken then it would be stowed on the starboard side of the superstructure and, yet again, secured to the handrail
Have you seen this site?
http://www.asrmcs-club.com/boatswebsite/rttl1b.html