After 20 years rc absence

i just got me an old OS Max-H 60. A little knick in the exhaust holes in the liner scratched piston and piston ring.
Liner and piston seam to be fixable but i need a new piston ring.
Does the OS piston ring 60-61 -LXCT 22- from Tower Hobby fit?
Somebody told me the OS piston ring fs 61 -LXCT 21- should fit