Good rig with one glaring problem - BlackHawk Vertical Shoulder Holster

Bought this for my 1911 primarily for field wear rather than concealed carry. I have a an Uncle Mikes Hunting Shoulder rig for a TC Contender but much prefer this shoulder holster. I may even replace the Uncle Mikes with one of these for the Contender.
The holster is comfortable to wear, holds the pistol securely including "cocked and locked" condition, and fairly concealable if you want that.
the Only reason I didn't rate 5 stars is the utterly useless rail mounts on the off-side tie-down. You can not find a mag holder that will go on a rail. it would be far more useful to have just loops or maybe MOLLE attachment loops. It is difficult to get the rail mounts off as well. Just a Glaring Error in design.d