My tip would be to find a baby carrying enthusiast, ask for help and just try the cloth solutions first if you think you could be into cloth. My children didn't like being carried (I'm a shoulder carrying father now), but the knots at least where super easy. The knots don't hold the weight, the cloth and the shoulders to. The knots mainly finish the excess cloth so there's not much reason to be afraid that your child will fall due to a bad knot per se. The cloth will sag a lot before that.