each one is different, if you live in an area where a gold show is coming your way go there, several types should be there for you to try. If not go to a local chapter and see if someone there will show you theirs as many people have them. Maybe you could go to an outing with a chapter where someone has one and you could try it. Each person has one type they like and ones they do not favor so much. All work when in correct conditions. My advice is try several and you will know what you like better.

Thank you Walter. I think I'll take your advice and hold off a bit till I can do just that.

I found what appears to be a spiral wheel assembly in my basement. it has two red spirals, some attachments but couldn't find a pump. anyone know what this is?

James I have a new Camel Mining Desert Fox gold screw, I bought two of them thinking that the family could use one and one for myself, I use mine all the time and they work great. they will pick up tiny specs of gold that you can't hardly see until you look in the cup and there it is. I am selling the other one because i found out that the one will do all the concentrates that I bring home. it is new only set up once and cleaned up and put back in the box, it still has the sample of gold/concentrates that came with it. it is the variable speed model that sells new for $359 if you are interested you can have it for $250 plus shipping. you can get me by cell 928-245-3212
Steve