I have been experimenting with sluices/mats for fine and medium size gold. I was fortunate to get 3 sluices for $50 off craigslist. What I have discovered is, each sluice works best with different water flows. I want to move the most material I can. So, the water flow determines the sluice. I pick which sluice best fits that. I tried doing the different mats for doing that. But, it just seems each style works best for a certain water flow situation. I have a Bazooka 24" sniper and a Grizzly Gold Trap Motherload. These work best if you are shoveling right next to them and have the water flow to not have to classify. You want the material to have a smoothe surface to get moving, (UR is the smoothest) then, use the most agressive mat your waterflow can handle, then the last mat to capture fine gold and smooth to let rocks roll out. (Motherload does a great job here)
The A51 I decided is for the fastest water because it doesnt have a flare, so I experimented a little and put UR, Talon, New style Razor Back, Talon, NS Razorback, Talon, NS Razorback, Motherload. This can really move a whole lotta material.
The A51a is the smaller version of the A51 and is one I made to be convertable. I have different mats for this one. For now I chose, UR in the flair, UR, NS Razorback, Old style Razorback, Motherload.
The largest sluice I have is similar to the A51 and I use it for gentil water as it has a flare and is great for that kind of flow. I have it set up with UR in the flair, a half piece of Yukon, old style Razorback, OS Razorback, Motherload, Motherload, Motherload.
I have a small sluice that I can take to sample that has UR, NS Razorback, NS Razorback, Motherload.
I hope this info gives you an Idea of what to choose to place in your sluice.



