Best way to weld/combine sub tools

[system]

Hey there, I have a question about combing subtools seamlessly.

I am trying to apply this mesh to the lamp and make it look like it was welded on or at least make it so there are no open gaps, I have tried the insert mesh tool, but it seems to always give me a gap, even when I use depth. Is there a trick to this?
Thanks:D

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[MealeaYing]

There is a brush that might do the trick, it’s called MatchMaker you can use that to project one subtool onto another, its like the cloning tool in 2D paint programs only FAR more fun and somewhat more tricky.