Well, you know when you have a plan on how to do something and then everything goes horribly wrong, well the rudder assembly did just that.
It started by first cutting the rudder shaft to the correct length, so far so good, then it came to fitting of the tiller, initially I envisaged adding another piece to the tiller to extend it along the rudder so as not to fit a spacer, that's when it went wrong. it looked like the plan was not going to work as the solder would release so I carried on with the next phase, attaching the tiller to the rudder shaft so that it could be removed, so with a fine pin drill, drilled a hole through the body of the tiller then it broke half way through with the tip still in the hole, so got a bigger drill and drilled just above it all the way through, the tip then fell out. Lined up the shaft to the tiller body at 90 deg and drilled through, that went ok, after a bit of a clean up, fitted the rudder, but then found I needed to remove the servo to get access, then it was trying to find a piece of wire that would do the job, to act as a cotter pin, too thin or too thick, the 3rd picture shows a piece of wire that would fit but was so hard to bend it fell out after a few rotations, the slackest was a piece of 1.5 mm copper wire, which worked but after a dry fit and the servo fitted again the fit was so slack it was useless, so it was stripped down and a screw was then tried and at the moment this is where it is at, but the next time I will be looking for a shorter screw if not a bolt to replace this one. Oh and the spacer wouldn't slide on so thats missing as well, it's just visible on the 3rd picture under the tiller arm.