Trying to get my L1500DT ready for work. most of the zerks are stuck (one of them is broken now) From reading here, it appears that the lock n lube is the answer to prevent the broken ones, but there's another tool out there and I don't know what it's called and can't find one for sale. It's basically a tube with a grease fitting that screws tight like the really old ones. There's a punch that fits inside the tube. You put a little grease in the tube, screw the fitting tight on the zerk, put the punch in the tube and hit it with a hammer. Anyone know what I'm talking about and where to get it?