Dwight:
Looking at the end of the flat spring that has the indentation, it fits into the frame where a small cutout exists for that purpose so it looks like the spring can be installed only one way. The magazine catch seems to work OK now with the spring installed BUT, it seems rather easy to move or slide the body of the leaf spring side to side to a point where it can become disengaged from the magazine catch and fall out. With the wooden grip in place, the problem would not be exhibited. The first observation I would make is the bend or bow of the spring is not enough to provide correct tension. The "feel" or action of the magazine catch seems to be about right.
Attached are pictures:
http://forum.lugerforum.com/lfupload/dsc00298.jpg
http://forum.lugerforum.com/lfupload/dsc00299.jpg
http://forum.lugerforum.com/lfupload/dsc00300.jpg
http://forum.lugerforum.com/lfupload/dsc00302.jpg
http://forum.lugerforum.com/lfupload/dsc00304.jpg