This is a great feature to help with wobbly necks. I didn't get my bolt hole drilled just right, but this plate helped hold my neck and made it sturdy. Now, the string height is perfect. I highly recommend this plate.
I was afraid it would be to large to go through the sound hole but it isn't

Perfect fit for the cigar box I was using.

Works exactly as designed. Provides a nice thick backing plate against the end of the box. Mike, you oughtta include one with each neck, adjust the price upwards to include this. Until then, don't forget to order one with your neck.

Helps !

Easy to install on my "Easy Neck", adds a nice layer of strength and certainty.