I am new to making horse tac. I am using 12oz. harness leather (chestnut in color). When I cut my straps and inspect them I notice that in some spots the backside of the leather splits apart near the edges, am i supposed to skive the backside of the straps? I skived a test piece and it doesnt look to good. My leather was drum dyed but it seems like the dye didnt go all the way thru. Any help would be greatly appreciated.