That's pretty good ! And that sucker looks like like he could really do some damage. You need to run your speakers louder. If the sound doesn't drive them out blow them out with shock waves.
I was thinking that the bass port could really get some dirt accumulation over time, one more thing to keep clean, great. I was also thinking that dust and dirt adhering to the mortite could affect the tuning. Clean is not my strong suit when it comes to housekeeping. Don't know about scorpions, but crickets should get an earful if they take up residence.