Jim's products are very good and well worth the price. To keep the SIG syringes working longer, I've had good results by removing the plunger after a flying session, wiping down the parts, then storing the body and plunger separately. At the next flying session, coat the plunger with a bit of fuel before reinstalling it. Storing it in contact with residual fuel seems to degrade it faster. Also, put a strip of clear packing tape over the numbers to keep the fuel from eventually removing the ink and it will last a long time.