Sorry to hear that PSM doesn't do well. Funny, it's one of my Favorite SE Asian varieties along with Bram Kai Meu. To me it has a sugar cane taste when you first bite into it. The ones i usually get from Truly Tropical anyway.
I was planning to top work my Bolt seedling with it and others in the near future. We'll see!
I see that some CA people are still using the Fl Turpentine rootstocks when they are many posts from Behl, Simon and Jf that Manila, Atulfo and a vigorous seedling planted directly in the ground is the way to go.
It really depends on how much patience do you have. My 15-25 gallons bought less than 6 months ago are all flowering profusely. Pay $$$ and get fruits same year, or get a seedling and wait a few. I myself planted a La Verne Manila 4-5 years ago, supposedly the best, it grew as a droopy plant, I grafted it with 10 scions last November, not thinking about night lows of 40s, all graft failed. I cut the branches to get rid of dead branches in December. Remainder of the branches started to dry up and die, I cut it extensively. You can still see it’s droopy structure. I will post a pic later on, although it’s not pretty. If it dies, I am replacing with a 25 gallon. I will still buy some on Manila rootstock because some varieties I want aren’t available at local nurseries. So far no fatalities for 15 gallon and up trees, only 3 gallons from plantogram didn’t make it during the winter, e.g., cogshall, ice cream, choc-anon.