So a couple of modifications to improve the build. The first suggested by Brian56 regarding the fixing screws on the rear deck. He suggested counter sunk screws which would sit flush with a soldered half crescent to make them look like deck tie downs. So here goes
Firstly I had to remove the stainless washers that I had epoxied onto the deck. After a few tries I found a very simple method. I fitted a centre drill bit into the drill which simply grabbed hold of the washer and spun in out. I'm sure that the heat of the bit had something to do with it too!
Next was to fit some countersunk washers in there place. Fortunately for me my brother in law works with CNC machines so he turned some custom ones out for me
I wanted to get them as flush into the deck as possible to I had to bore out the existing holes but at the same time keeping them flat on the bottom. In the end I reduced a dremel grinding bit down to the correct diameter and then bored the hole out as deep as I dared. The washers were then epoxied into place
I then made the deck tie downs - I bent some brass wire into a D shape and then simply soldered this onto a M4 countersunk brass bolt. They are a lot stronger than I thought they would be
And when they are fitted they look like this
I really like the result - Thanks Brian56 for your suggestion
The only problem I have now is what colour to paint them. I'm really tempted to paint them in the same orange as the deck rails
but they could be red, black or the same grey as the deck. I would very much welcome suggestions and comments on this please.
The second modification was to the rudder servo set up. JimG posted a solution and I have followed his advice. I have changed the servo horn to a round one and reset the geometry on the linkages. The result seems to be a fairly even turn between the rudders
Thanks JimG for the help
It might me a while before I get any more work done but I'll try my best - Mark