I decided against the carpenter!
Today I bought some wood preserver,and I have to apply two coats, the 2nd one 12 hours after the first, so I'll do the second coat tomorrow.
Two different carpğebters said that they make the joins on the frame !
This maybe because the construction is like this:
Instead of one complete bent and jonted frame they have two side by side and bolted together. This means that the where one of the frame pieces has finished ( with a 1cm gap - not jointed) the other frame has a continous piece and so with two bolted together you get a thick frame ( nearly 4" ) You can see this in the photo
The gap between frames is narrow - ony about 9" - For this reason they always fasten onto the frame.
I have cut the wood out accordingly and have scoured out some rooten wood from one the frames with my electric
drill and soaked that with wood presever as well. I am going to screw in an extra piece of preserved wood to give additional strenth to one of the frames.
I am feeling much more confident about the boat now that I have decided to do the work myself.