Mark and drill holes for 6-32 SS screws through mag sides.
Clean up the blowout inside the mag with a file. Insert aluminum channel, mark through holes, remove, drill channel with a #36 and tap 6-32.
Countersink screw holes in mag side, clean up blow out again.
Mark tab on bottom to clear aluminum channel, cut back with dremel. Leave step on bottom to hold spring base when re-assembled.
Polish face of channel, install and screw into place with 6-32 x 1/4" SS screws. (smaller screws can be used, but I already had a 6-32 tap)
Bevel top plate back so cartridges will feed smoothly.
[img]
http://i595.photobucket.com/albums/tt32/Rancho_Loco/Tikka%20Mag%20Mod/IMG_0039.jpg[/img]
Reassemble magazine.
[img]
http://i595.photobucket.com/albums/tt32/Rancho_Loco/Tikka%20Mag%20Mod/IMG_0040.jpg[/img]
Done!
[img]
http://i595.photobucket.com/albums/tt32/Rancho_Loco/Tikka%20Mag%20Mod/IMG_0041.jpg[/img]