An adhesive surface for assembly would be cheaper: no additional holes in the boat and a later attachment of another product is easier. For sloping bulkheads less suitable, pendulum can grind.
Simple but fully adequate heeling gauge that I have been using in this form on our boat for several years. Unfortunately, the current model is only made of plastic and is therefore more susceptible to breakage if you get stuck on it. The old models were made of die-cast aluminum. Therefore only 3 * for quality