I'm not a Partner expert but I'd certainly think $35 is a bargain .
Now then stuck or gummed rings a story .I was given a McCulloch 700 a guy found at a trash transfer station stuck tighter than than a bulls butt at fly time .I gave it the kerosene treated for about week and sure enough it cleared up .After some run time to limber the old timer up a tad it now runs as good as it most likely did factory fresh .So my point is some times these things do not require a tear down to give them a new lease on life .--but some things they do ---.The two p-100's were complete reworks ,lock stock and barrel so to speak and they do run great without even having enough run time to even seat the rings .However on the docket I have some large stuff coming up before the frost is on the pumpkin .A 36"" Hickory should be enough load for 99 cc's to flex their muscles .