Thanks, X-Atm! I've got it now. I went back and reread the comic more carefully, and caught that "we'll make the adjustments." On my first reading I thought it was because the gun's initial TF form would be influenced by their clothing. So I thought you had to already be wearing the clothes and they would be a sort of parameter to limit your TF size. That would be okay if the clothes were the same size or bigger than your normal form. But it would be difficult or impossible if the TF was going to make you smaller. Like maybe a 200 lb. guy wanted to be a size 6.
Actually, when I read "we'll make adjustments so the clothes will fit right" I somehow imagined Tedd and Grace doing quick tailoring on the clothes. Like Tedd with a needle and thread putting a dart in a skirt to make it fit someone. Something like that, I wasn't sure what. LOL, it was late.
Now I get it that the gun doesn't "sense" what clothes have been provided, but that Tedd or Grace will look at the clothes and play with the gun until the person's new TF form fits the clothes. But will Tedd do this for the original-boys or the transformed-boys? Will Grace be helping the original-girls or the transformed-girls?