Yes Sir Philipat,
An adjustable Idler would be Ideal...
I've read the HennTec Idler set up is a good one, if a bit Pricey?
I am pretty much decided on not putting too much Cash/Effort into this Hull over all... As there is Much to change.
Thinking that it might be better in the end to pick up a Taigen Hull to build on, if it comes to that...
Here are photos, Port and Starboard, showing the Slack I was talking about earlier.
To my eye, and judging by my test run, I need to tighten them up.
-gus