I recently acquired a set of Border Hex 6 limbs for my Bear TD. I'm very happy with my limbs but do have a few questions. The limbs are marked 58" A-50#. I own both A and B mag risers and a newer black and red B riser. Border stopped making custom limbs for Bear recurves around 2013/14. I gather that my limbs are considered medium limbs(#2) which make a 62" bow on a B riser, 58" on an A riser. I would be interested in any info available on these limbs. Particularly interested in recommended brace height on both A and B risers. The limbs are marked for an A riser with no mention of a B riser. Also, is there any reason these limbs should not be used on the older magnesium risers. I would appreciate any info the TG community could supply.