I didn't rely on the thick adhesive pad on the back, just screwed it on. It was in the bottom half of the retractable trailer above the headlight housing so you didn't have to worry about leaks through the bolt holes, but I put some silicone in anyway because that's how I ride. Definitely made setting up/leveling a lot easier. Worth the effort.
DigiPas DWL80PRO: Compact Digital Level & Angle Gauge - Accurate Protractor, Bevel Gauge, and Angle Finder, 0.05Β° Sensitivity, 4 inch Pocket Size
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π Kapro 905-41-24 24-Inch Level Tool - Premium Bubble Level with Shockproof End Caps, Superior Accuracy & Visibility, Optivision Red and Plumb Site Dual View Vial, Condor Spirit Level
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Laser level HiLDA 4D/16 set 4
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β Stainless Steel L-Square, Size 3-Inch x 4-Inch, Zona 37-434
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π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
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