Oddly enough, I place the vice close to the saw as it supports the weight better and I tend to sharpen close to the saw, file and roll. Not used it for ages though as the twiddly bit has snapped off, so freehand between the knees or wedged on the Land Rover tail gate.
As for your rakers, there is a guide for that too, or about level with tooth entry or a smidge lower to be a bit more aggressive. Chamfer the leading edge with a brush of the file to keep its purpose smooth.
Current chain has no rakers and about 2mm of tooth – moneys worth, probably another sharpening in it.
EDIT: beaten to it by my slow typing again, I even use two fingers to type