The two straps I use go around lipo perdendicluar to the length - one near the front and another near the back. I found lengthwise straps couldn't really be tightened enough and prevent the lipo from moving a little sideways and then either slipping out and coming free or being able to move around. I tried thin and wide lengthwise straps, with velcro and secured with a buckle type clamp. Someone told me to try two smaller ones at 90 degrees and I've not had any further probs with any movement.