I was looking for a high quality adjustable leather strap (without clanky PeakDesign anchors) for my SL2-S, and found this.
Asked Justin to modify the neck pad from fixed (standard) into slidable (LEGACY Adjustable strap style) version, very glad he accepted the request.
Waited few weeks unlike his competitors, but very pleased about the finished product. The leather comes in just the right thickness and strength, the cutting & edge finish is top, so as the stitches and hardware. Highly recommended, you get what you paid (and waited) for.