Having a feed mech would be great...mine is all hand fed and getting the speed/pushing force right is a bit of a chore. Using rollers would be cool, but keeping the rubber 'sticky' and clean may be a challenge. Being a pro computer geek, I have seen good results with using a very lite moisturizer to keep the rubber in printers from drying out too bad when they get really old. I am sure there are better ways though.
On a similar note...
My biggest regret on mine, and warning for others, is to use the most solid materials and joints you can manage! If the drum is off round by even the tiniest amount the thing will shake itself apart.
