Mail the head off to Clarence Lee, he will put in a helicoil for you for $14.50. Quick service and super job. Address is C. F. Lee Mfg Co., 10112 Woodward Avenue, Sunland, CA 91040 USA.

Higley will sell you a tap and die for 1/4 32. I often run the plugs thru the die to make sure they are correct size. You can locate Higley on the internet.

Cheers,

Chip