I have always trusted my gut when checking belt deflection but decided to give this tool a try due to the low cost and positive reviews. Seems to work fine, but I haven't tested the accuracy yet. Interestingly, the results with this tool were almost the same as lifting the strap with your finger and about 10 pounds in my opinion. However, going forward I will use this tool as is in my tool box and follow the procedure outlined in the service manual.
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