We will be using 2 knots as the default proper badminton stringing method. Normally those who wanted 4 knots is watched too much online video, "no knowledge at all" so they believe 4 knots is better, this is layman's words. However, we are able to do 4 knots for Hybrid stringing like Yonex BG Aerobite, the best is 2 knots which we have more than 1000 customers who love our Certified Badminton Stringing.