What methods are there for jacking up the car nice and high? I've just tried to jack up from the rear but my trolley jack has a max height of only 38cm. My axle stands can go up to 43cm so if jacking up from front or rear, you'd need to go even higher than that to get that kind of height near the wheel axle supports. I've seen the method of using 2 old brake discs to add some height. What other methods would you suggest?