@richardjjs
Ok, lets see if I can make this make sense.
You said you have a3, 5 and 4. That means you are missing a1, 2 and 6.
Again, there are 2 of each.
I found a1 on L5 and H3.
I found a2 and a6 on L1 and H8.
You listed that you had all of the "b" parts.
You listed that you had all of the "c" parts except c3.
I found c3 on L2 and H9.
On the "d" parts you listed you had 1, 2, 3 and 5. However, there are only parts 1 through 4. So, your part listed of d5 must be something else.
Then you say you have parts 7.1 and 5.1. Those should be the pieces closest to the bow in the planking above the wales. If you have something installed there, and have these parts, you installed the incorrect part.
Next you commented in the parts you have removed that you have parts with "e" and "f". In my understanding of the construction guide, these go below the wales (plank rows "a" through "d") and appear to be single thickness.
You listed e2,3, 4 and 5. This tells me you are missing e1.
I found e1 on sheet H3.
In the "f" row planks, you listed you had f4 and f5, meaning you are missing f1, f2 and f3.
I found f1 and f3 on sheet H7 and I found f2 on sheet H4
I put some extra spaces in there to help break up what we were talking about.
I hope this helps you find the parts you are missing.
NOTE: You should use magnification to read the parts numbers. I had to and still almost mistook a "d" for an "a" .
Happy building !
Jeff