Not Mason per se, but I use David Jung on the northwest side (Mason Hwy.) of Fredericksburg for a lot of stuff. Works out of his house and he is usually slammed during WT season, but does good work and is reasonable. 830-997-2296. If Round Rock is your home, and you go home 290, it might work.
...and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth. Gen. 1:28