By the way, IMA (International Military Antiques) has leather MP-44 slings for $19.95. Plus there is a discount coupon of $2 off on any repro item, pretty good deal. I was trying to find a 98K sling but this should be what I need.
Also, there is an AMERICAN RIFLEMAN Mobile review of the gun and a comment by Jim Rempel. He says he cured the shooting low problem by disassembling the rear sight and adding three SAE #6 flat washers to the screw pylons. I have not tried this but it sounds better than filing down the front sight which was what I had planned.
The tangent comes off exactly like an AK. Push down on the front, pull out to the rear, lift out the spring, then remove the two Phillips head screws. Shim with three washers on the front and two or three in back. Fire for effect, then adjust.