I was having a hard time reaching all of the grease nipples on the Jeep with the grease gun. I noticed that the outlet on the grease gun, into which the 8" straight pipe screwed, was a 1/8" NPT thread. I dug around my stash and found a 3' length of braided stainless line from a mechanical oil pressure gauge kit, and it too had 1/8" NPT. Remove the 8" of hard pipe from between the gun and the grease nipple fitting, and replace with 3' of braided stainless flex line, and voila - grease nipple fits near anywhere, and the gun can be pumped against the floor, for one-handed operation.