I have a box of roller jewels and just pick the one I need. Then try to install it. Recently I'll bet I lost / wasted 10 jewels to tweezer snap.
I finally got one in the hole but have not heated it yet. I now use my 12" photography tent to work in. When I get tweezer snap it bounces around in the tent instead of the floor. If I could find all the parts that are in my carpet, vacuum or table top I would be rich. Try it , use your tent....