Can somebody suggest tool(s) to release the two miner moss retainers? For me pulling the sluice box outwards and simultaneously pressing the pins inwards doesn't work. I've also tried to pry open using a small flathead screwdriver, still no luck. I've not tried it yet in the field as I just received it, but will it work better in wet condition? Some people filed out part of these pins so that they can be snapped open or close. Do you recommend that?