Some good news for those using OS 25's. Tower Hobbies has a new supply of wrist pins. Part #LXCS81 has the white endpads and fits the LA, FX, SFABC motors. The end pads tend to wear out on one end and need to be repaired or replaced before they start scraping the cylinder. They're fairly inexpensive at $6.29 a piece. You can save 25-30 cents by buying more than one.
New end pads are a good bit tricky to make because they are so small.
Phil C