Sent out a few of these yesterday so figured i would just post up here how to bend them to the shape i am using. After they are bent to the general shape, have been bending them side to side, up/down and anyway i can to get them to sit flat on the jighead. Have to adjust the angle a little for each one, the metal is very easy to bend. It all depends on what you are holding your jighead with to get the right angles. You want it so the plate will lift nearly straight up off the head when you push down on the handle end. If it slips side to side when you push down, it will push the powder with it. Like i said before - it does not come out perfect every time - just have to get the right angle and push down straight on the handle end.
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Bending them down over a countertop edge or other hard corner is easiest. The 3 lines are to show the general area to bend. Here is pretty much the starting shape i use:
1st bend: Flip it so the color side is down, silver side up. Bend at the center line of the 3 lines. Bend it down against the hard edge to make a 90 degree corner.
2nd bend: Flip it so the color side is up now and bend the end opposite from the holes. Bend it down against the edge to make a ~45 degree corner this time.
3rd bend: Keep it colored side up but now bend at the line on the other end that has the hole. Bend it down against the edge to make another ~45 degree corner.
Not sure if it helps or not, but i bent the hole plates on mine so they have a spoon shape. Can do that pretty easy just with your thumbs.