I have just had a go with my new (ish) 5k Reber - it is brilliant but you do have to remember not to put the casings on the nozzle with the end tied before you start to move the handle and build up the presure - my kitchen wall is a lovely shade of pork and stilton now, and didnt the wife split her sides laughing, well no!
What an easy bit of kit to use, it makes stuffing such a doddle for the larger quantities and although the wife now wants to know when I am going to give it another go (wants to invite her friends around to see the splatter gun) the speed in which it stuffs means I get out of her hair even quicker. It is very robust and well made and although I am not too sure what the largest nozzle is for, it will be fun finding out.
The second first was using the sheep casings. They were not difficult to use and although I did have a few splits, I will most certainly use them again. Out of interest they did not seem to colour up when cooking in the oven for some reason. Possibly they dont give as much colour as the hog. I am sure someone will tell me.
Paul, out of interest you were right to suggust moistening the mix a little it did make a difference to the ease in which the sheep casings were stuffed. cheers.