filling in screw holes

I am seriously enjoying this type of body work.

I have a serious amount of screw holes on the top of the tub.  I use a MIG Welder to fill in the holes and then grind them down so they are flush with the body.  Simple!

But what has made this a lot easier are these 2 round magnets.  Years ago when I was showing the kids the insides of some electronic device, I found these brass magnets.  I like magnets and hung on to them.

They have made this job so easy.  I just slip one of them behind a hole, zap the hole with the welder, the magnet holds the weld together.  The brass does not bond with the steel, so they remove easily.

Like I said, simple!