"without the bumps when resetting the pump trigger."
The reason I like the one mentioned is I keep the release depressed and control the flow with my fingers, no "bumps".
I can honestly say I have caulked THOUSANDS of yards in my career, by doing so you get the "FEEL" of the caulk use and can do a NICE job.
Production caulking I would consider the air unit but for the smaller areas that would a no go.
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