Ok...got the screws and replaced the Philips screw with the slotted. Still having a hard draw, but now it seems the cartos themselves are to blame. They draw somewhat hard to begin with (bad lot I think), and then I put them on the Buzz and its a bit harder.
BTW....replacing that top screw is not issue (nothing will fall out inside that I saw/heard). But I will say if you have small slotted magnetic screwdriver it will make life a LOT easier!!!! Its hard to get that little screw down in there.