Sorry Eddie. I should have been more descriptive in the beginning. I haven't owned a lever grease gun in at least 30 years. So it's been a looooonnnnngggggg time since I've needed 3 hands to grease anything.
If you are still using a lever gun you would benefit greatly by stepping up to a pistol grip gun. If you have a friend or neighbor that has one, borrow it.
With a pneumatic or rechargeable gun and a long flex hose all one hand does is hang limp at your side gripping the gun and pulling the trigger when needed. This frees the other hand to guide and run the zerk coupler.
Lastly, I have little or no use for a setup that will only grease 90% of the Zerks. I simply don't understand that. So to grease my little JD mowing tractor I would need 2 guns if one was equipped with a solid tube?? Why would I bother to get out the solid tube lever gun if it won't do all the Zerks?? Not picking on you Eddie, just can't understand that at all. Why not just start with a pistol grip flex hose gun and complete the job??
But, that's why we have these discussions, to share ideas.