I purchased an Excalibur EX21 from someone that had never used it. It is a refurbished scrollsaw. Anyway it's been great to use but today it caused me trouble. When I clamp the blade in the top and tighten the tension it looks fine but the tension lever pops loose as soon as I hit the pedal. Is there anyway this can be fixed or do I have to replace it.
Sorry for the length.
TYIA