You don't need to buy another grease gun to install the corn head grease. Just remove the tube of grease you have in the gun and clean the top cap. Place the corn head grease tube in the gun and after a few pumps of the gun into a rag the corn head grease will be the only grease coming from the grease gun. I was concerned about the same thing but was assured by a local Chevrolet suspension specialist that he does this all the time with no problems.
Tim
