Thanks Garth.
I added the second smoke dispenser the the crewman told me they carried. They had no depth charges. Wile the resin was curing I added the 40 mm depression rail and when that was done i started looking at photos to see where to best mount the 2 dispenders.
It was then that I saw that boats of this vintage and time period in general and the Ron 33 boats specifically, did not have depression rails. They also did not seem to have the rails built into the rear of the 40 mm mount that late boats had. Lastly, the 40 mm ammo locker was wider and generally bigger than the late boat's had. Looks like i have more work to do.
The photo in Chun's book, page 61, shows several boats. By close examination I can make out the boat numbers 490, 491 and 493 and they are like I will be changing to.
Just when i thought I was getting close!!!