LOL,
Hey prarie, you can't be a knife maker unless you've had creative cussin' 101! Read a post by a well known maker a while back. Said he put a cuss jar in his shop for his grand kids college fund. Had to take it out though. He couldn't make knives fast enough to pay the fines! ;~)
The guys are right pastor. You should probably glue um up first cause you don't want to depend on pins alone. Don't want the new owner callin' you every couple years to tighten the scales back up. Unless you just like um and want to make sure they keep in touch that is. ;~0
Just pre measure and leave um long. Or leave it extra long and cut um off after they dry if your like prarie and really careful not to leave a big gap between pin and scale. I like to leave around 1 and 2 32nds sticking out, depending on how big the pin is. Just long enough you can set um without scuffing the scales. A dime maybe a good easy guide for a first try. Then peen um just enough to snug um and then file off the extra.
Remember you want to leave the same amount on all of them and try to apply the same force to peen every one. Otherwise they may not be the same size and shape when they're finished. So when you start, don't get interrupted or start swapping sides. Just do the same thing on each one till they're set once. Then check um and if you need to do it again you can. That way they'll be certain to be symmetrical. You can always do more if needed. But like the guys pointed out, you can't take it back if you go too far. GRRRR!
The truth is, the glue will do the work and all you want to do is fill the gap between the pins and scales and stop pull out.
Good luck pastor. Just take your time, be deliberate and it'll come out great.