I've never seen them put through a hoop to set them. Also our field is a real optical illusion. It appears to sitvup above much of the surrounding landscape in the overshoot direction on the high side of the field so it makes the high house look high as the target doesn't cross any background so it's skylighted well. The low side on the other hand is below the treeline making the low house targets appear as if they are springing teal! The skeet shooters at our club are a pretty informal bunch and aren't concerned with regulation set targets, lol. I don't think they would be off by much though however the high house machine is in such disrepair the elevation adjustment crank handle is seized and you have to place or remove a wedge to set heights. We are going to have to replace the machines sooner than later as we've exhausted the parts supply from the spare parts machines. Trouble is we only have about two to four guys that shoot skeet weekly so there isn't much revenue on the field for replacement machines.