I had purchased a couple of Chinese JLW knockoffs from Ebay some time ago. They were essentially trash but, they did come with a harder spring that fit nicely into my real JLW. It also help offset the weight of the large 45mm bubble ball I use.
This brings me to my point, if one wanted to have less resistance with a Sanwa or Seimitsu stick they could try replacing the 35mm ball top for a 45mm one.
I would also imagine that using a 30mm ball top would make a stick feel a bit more resistant but, I don’t know how anyone could play with such a small ball top.
Also, for the novelty of it, I tried putting a 45mm ball on Seimitsu’s LS-33 (which has a very soft spring). The stick could barely hold the ball in the neutral position and it took almost no effort to move. This might be a good combination for you weirdos who like zero resistance but don’t want to be ostracized from the gaming community for having removed their spring entirely.
Sorry this information has nothing to do with happ controls.