Here is what I did. I went to the hardware store and got two replacement bubbles for levels. $0.99 cents a piece. Then I got a big fender washer that was big enough to fit around the shaft and a small enough to fit with in the balls on the swash. I two part epoxied the bubbles to the washer in a right angle. Awesome little tool for a couple bucks and REAL accurate. I use a piece of plywood on top of a glass table for a workbench. Just level the wood with playing cards. You can pretty much get whatever washer you need to fit whatever shaft you have, it's great. I never leave anything to the eyes. I have shown a person how his swash was out when he used a trad swash leveling tool.