Paravane build suggestions?

I am sourcing materials for a paravane build on our 55' steel trawler. Correct boom size, material and length are my main concern. Thank you

 

For a steel trawler I would suggest steel.

 

Have you sourced the paravanes themselves yet, or are you going to build these as well?
Google found this interesting description of the paravane set-up on Mobius -
Paravanes | Möbius World https://mobius.world/category/paravanes/

These folk (who are in WA, not Sweden) supply paravanes 'off the shelf' in varying sizes -
Products - Stabilizers - Kolstrand https://kolstrand.com/products/stabilizers/

 

We always made the booms from aluminum, have had a few of the kolstrand galvanized paravanes. Got a pretty good scar on my leg from ones stored on the house in the cut mount they provide.... paravane on end is a rough thing to run into.

Last boat had the best arm rig I've ever seen, it had a hinge arm that pivoted down from the mast to the main boom stay. It had a pin that locked it down so that the arms could be used out without bouncing back with an undeployed paravane. I'll have to dig and see if there are any pics of it setup, know there were a few taken before the boat was sold.

We put the arms out fairly often as it seemed to slow the roll just enough to notice when working pots or longline. Had pretty good sized vanes and it slowed me down when running, remember being halfway across the goa and seeing the .6knot slow down... we rolled the next 10 years without them.