The chuck removal wedges are a good idea, but they are expensive for a complete set. A stick non-drive side crank comes off easily with an automotive gear puller, but not so for the drive side (the spider is usually in the way of the puller "fingers"). If only the drive side crank is stuck you can remove the non-drive crank and pull the axle out of the BB and then you can tap the drive crank off of the spindle while it's on the bench.