I've been contemplating this for a year now... I've thought about the "miner" model and building a flair for a 4-6" gravity dredge. I've been told it might be to much material to process though... Still curious though.
I had the same idea passing thru my head last year, and was given some helpful insight on potential issues, naturally the "too much material" concern is one of the biggest...my thoughts are as follows.
1. Angle of the sluice is a major deal when it comes to the steeper the better to clear the grizzlies, and most of us know that the Zooks can run some serious angle.
2. Make sure not to overload the dredge, like with any setup you will need to find the median for ability to process material, as I understand you cant just bury the hose on any dredge, they all have a water to material ratio that helps them to run optimally.
3. I imagine the fluid bed would need to be fed by the water pump off of the dredge, to keep it consistant.
Im sure at this point, however, that there is tons of variables I am not aware of. I have to think that the bazooka would need to be set to be an adjustable angle, for varying conditions, and would need an auxillary ability to clear the griz and slick. One of the fellas I dig with runs a 4" dredge with air and heat in the winter, and he is a bit of a badass. On the dredge that he runs, occasionally tailings pile up at the end of the sluice, but they weigh the end down just enough to slightly change the angle, and clear themselves.
Just my two cents, but I will be buying a 2" backpack dredge later this year, and will try to fabricate the sluice to use my 36" prospector for the sluice, just as a fun project in between trips with the new 4" Dahlke!
JB
bazooka porn ;-)
I'll get out there again in the next few days and hopefully be able to take my Bazooka 
You will need to break it in properly.
