I put this on one guitar i built and promptly bought another for another guitar. Awesome product. Use them!

I bought the mandolin version and fitted it to my Gibson. There's a lot of extra material to remove, but the result was great. Easier tuning (the old nut had tight slots for the A strings), better intonation. Later I used one of the extra frets in the package to fix a tenor guitar. For that, I simply filed the necessary ledges in the existing nut and widened the string slots. It would be nice if Stew-Mac would also sell the offset tang frets separately, for retrofitting to an existing nut.

i HAVE ONE O TFHE NICER IMPORT JOHNSON ACOUSTIC ELECTRIC CUTAWAY GUITARS . SOLID SPRUCE TOP. INDIAN ROSEWOOD BACK AND SIDES. SOMETIME BACK I WAS ADJUSTING THE TRUSS ROD AND THE END BROKE OFF. LUCKILY THE ACTION WASN'T TERRIBLE. THE REAL PROBLEM I WAS HAVING WAS WHEN I PLAYED AT CHURCH I SWITCH BACK AND FORTH FROM CAPO TO NO CAPO DEPENDING ON THE SONG CHOSEN. WHEN I TUNED MY GUITAR STANDARD IT WAS FINE AND SOUNDED PRETTY GOOD BUT WHEN I USED THE CAPO THE GUITAR WOULD BE SLIGHTLY OUT OF TUNE. i JUST HAPPENED ACROSS TE ZERO GLIDE AND FIGURED I HAD NOTHING TO LOSE SINCE I COULD RETURN THE NUT BACK TO ORIGINAL WITH NO PROBLEM. I GOT THE CORRECT NUT BY USING THE STRING GUIDE PRINT OUT. TOOK MY TIME FOLLOWED VIDEO INSTRUCTIONS AND MADE MINOR ADJUSTMENTS UNTIL I WAS DONE. I CANNOT TELL YOU HOW PLEASED I AM. NO MORE OUT OF TUNE WITH CAPO. CONSISTENT BRIGHTER SOUND AND MUCH BETTER ACTION. I WOULD RECOMMEND THIS PRODUCT TO ANYONE I AM EVEN THINKING OF PUTTING ONE ON MY 1963 GIBSON LG1 SINCE THERE IS NO PERMANENT CHANGE TO THE GUITAR. THANKS ZERO GLIDE