Height can vary significantly whilst still being a tight squeeze! I'm just over 6ft1 and passed the buttock/knee length by 1mm (on a best of 3 average!) Found it a mighty tight squeeze in the T1A (although bizarrely not the T1, anyone know the reason for a difference in length?) and wouldnt have wanted to have longer legs if I'd ejected tbh. Conversely a mate is a good 2 or 3 inches taller than me, but fits about the same, as his legs are the same length as mine with a longer torso. At 6ft4 wouldnt fancy your chances though!