Originally Posted by blamester

So when installing these cranks the first turn of the bolt is loose and you can align the cranks then. Wiggle them till you find the slot and then tighten. Then the bolt should tighten up as it pulls the crank on.
Your idea of the crank splines not lining up is almost certainly wrong. More like the crank is buggered from installation or not lined up correctly. 45 deg is not correct it is much less between splines.