I purchased a Look HSC-3 carbon fork with a 300mm steerer tube. I believe I would benefit by having a carbon spacer stack height of 40-50 mm, but I have heard that the maximum stack height should be 30mm and some have said 1.5 inches (~38mm). I'm riding a 110mm, 10 degree rise, 35mm steerer clamp stem along with a frame with a head tube length of 171mm and a Chris King 1.25" headset. I'm 6'3" 172 lbs. What can I truly get away with and still be safe. My riding style is strictly road riding, the local hammerfest, etc. Thanks for the help.