I have the Royal sluice in the video. It's handy, light and well made. I've had a lot of fun with it in the season that I've used it, but in hindsight I would go with a 36 in. or smaller fluid bed sluice. The gold in my neck of the woods is very small and I'm not convinced it catches the small stuff very well. Also I can already see wear at the corners of each section from opening and closing it repeatedly. Plus, I worry about it dribbling fine gold out of the leaks at each section. This year I'm going to tape the seams in an effort to minimize any loss.
I'm now in the process of making a fluid bed sluice.