"Is this something that can be retrofitted to a leaf sprung trailer?
Is that brake line also acting as a limiting strap? Sure looks tight. "
Yes they cut everything off right up to the frame and attach the IS system.
Good eye on the brake line! I had Rolling Retreats adjust it when they took delivery.
When I have my 2" riser added at MorRyde later this month they will be completely re routing the brake lines. From what they told me it will be a big improvement over DRV's job.