If you use a rotary punch your hand is going to feel it. I use a single punch to eliminate hurting my hands. If you use a thonging chisel make sure the slits are big enough for your needle to pass through 2 layers of leather or you will have trouble. Also if you're wanting the lacing to last I'd use Kangaroo lace. I've used the other and it won't last long. It's not strong enough. Good Luck