Be conscious of the fact that bill angle, bill position on the bait, the buoyancy properties of the bait, bill size, and bill shape all work together to make a crank run efficiently in shallower water. Generally speaking, the more vertical the bill angle, the shallower it will run. Also, the shorter and more square the bill, the shallower it will run. This is because the more water that runs around the bait—as opposed to over the top of the bait— the shallower it will dive. With that in mind, making a bill too short may not allow it to grab enough water to run at all. I’ve found that bills positioned further back on the throat instead of on the nose of the bait not only run shallower out of the package, but they leave more room for error when modifying. Another good thing to remember is that flat-sided cranks are more sensitive to mods than round baits, mostly because the bills are proportionally narrower, so take extra care when tinkering with them.