Hello, Jeff.
This is terrible! I'm so sorry this happened. Of thousands of supports sold, you are the first to report a cracked guitar. Please contact me directly using the Contact Us link on the site. As long as you followed the installation instructions and especially the points below, we will cover all costs associated with repairing your guitar, or replacing it if necessary. We will take you at your word with that.
The cause(s) of the magnets not staying adhered can be any of the following:
- The area wasn't properly cleaned before attaching the magnets.
- The magnets were touching an interior brace or a very curved area, not allowing the adhesive strip to make full contact with the side of the guitar.
- The support was not allowed to stay on the guitar long enough after the initial installation for the adhesive to fully cure.
- The magnets were attached with the adhesive strip and then the adhesive strip was moved and reused in a different location.
Best regards,
Geoff Ferdón
Sagework Guitar Supports