Seeing as we have a lot of braiding questions I put this together Before you start, make sure your heatshrink will (a) fit over the cables and (b) not be more than 2x the diameter of what your bundle size is. Heatshrink normally has a shrink ratio of 2:1 so 12mm hs will shrink to 6mm, 25mm to 12.5mm etc. In this tutorial I am using 9mm luminous heatshrink but that is because that is what I like... even though it costs a fortune! The braid itself will expand a lot, but dont use the 3mm braid on a 20mm bundle beacuse (a) you will use a lot of braid and (b) it will be thinly spread, allowing the cables to show through. Much better to use a bigger size of braid. I am using the smallest size braid on this bundle because it was a scrap bit i had lying around! The cable is 4 lengths of 20swg cable with a molex on the end... lets go to the piccies..... First get your bits together... here we have 2 bits of heatshrink, a length of braid and a bit of wire. Slide on one bit of heatshrink, then feed the wires into the braid. Push the braid along until it is in position. Slide the heatshrink over the braid, add the other bit of heatshrink, making sure that all the whiskers of braid are under the heatshrink. I like to have the heatshrink cover the braid by .5 to .75 of its length, to give a bit of flex and to prevent the braid popping out from under the heatshrink. Finally, the good old heat gun treatment! i use that gun on low setting and hold it about 3 inches away when using the standard nozzle. If you hold the gun too close it will melt the braid, the wire insulation and even the heatshrink! hope this helps someone! time taken for this tutorial was 10 mins. It will take you a bit longer if it is your first foray into braiding, but take your time and you will get good results.