I have repaired 2 runflat tires myself both at home with the awl and hook type repair system with the 4" rubber/twine inserts and both repairs have lasted more than 9 months.
The first was 1" from the outer edge on the contact patch of the right front ant the second on in the middle of the contact patch on the right rear.
The repair area has to be accessible, in the case of the front, it was a matter of adjusting the work area with steering but for the rear, i had to remove the wheel
It was easy and after repair I checked for leaks around the repair with
dish washing liquid soap.
It was worth a try with the kit which cost about $5and came with 4 inserts
