My mate @PablosGold has tweaked the dredge… new motor, longer 6" hose on the front. I was impressed by the amount of material it could shift! The 2 of us churned through quite some ground but only got just over 8 grams for the effort over a few days.
It’s got a cool riffle setup inside. Wish I’d taken a few photos! Was catching very fine gold and black sand… more fine stuff than I ever seemed to recover with my standard 4" Keene (but that could be operator error 
).
Wish I’d thought to do this before we went bush - Testing Gold Recovery of Dredge