I'll need to do a bit of work on support heights & maybe extend the base with some extra box section, but many thanks to Simon (an avid boater himself from whom I purchased said trailer) for filling me in on the vagaries & legalities of trailer use & set up. On his recommendation, I'll probably go for a series of larger nylon rollers for the final set up - such as he has on his new £1800 trailer - 

 

 

For now though, a length of scaffold tube (34dia x 4wall) will get me up & running for the test.

 

It took 2 hours to hoist the boat back into the rafters & place the trailer ready for measurement: It's a very tight fit though, so the trailer wheels will have to come off during the majority of the build, to be replaced by smaller castors similar to those I had on the wooden cradle. As well as lowering the overall working height, this will allow more and easier side-to-side movement.

 

 

I decided to go  for some new rollers for the trailer, so that put the project back a bit (more), until I realised that, with a holiday in the way, a launch before the end of June was no longer a possibility. Having got everyhthing ready for launch, I had a few hours spare, so put these to good use cutting the sawn stock down to size for bulkhead & floor timebers, and a few of the rear decking strips