Is there a proper way to port moves from one PSA to another?

[MrDarthGogeta1]

Hey guys, it's me again. This time I have a Brawlbox and PSA Issue.

I've been doing this for a while with Link; I've been replacing certain animation and attacks from several PSA's and other motion files, I know how to replace animations in Brawlbox and I copypaste things from one PSA to another (when I do this they're for the same character; Link). However, when I do this, the PSA goes up a kilobyte or two.

Am I doing something wrong? Sometimes the game freezes if I add too much to the PSA, which probably means I went over the filesize limit. Is there a way to not alter the size of the PSA too much, or is this just a side affect of copypasting the moves. If you know something that I can comprehend, that'd be nice.

Otherwise, I'd be a little sad.