[elfly]

So how do you trace the boards?

I am assuming that you put the board at the correct angle on the floor, let it go over the upper entry floor, use a ruler to extend the line of the wall over to the board, trace that, cut it, then reverse the process but this time the part you just cut can go on the floor which will produce the correct angle on the wall?

[tedapeters]

I use a cad program (like sketchup) to give me the cut points for the stringer (boards) on the horizontal (step 7 goes from 58.75" to 67.125"). You then use a carpenter square and they make little brass screws you can screw on at the correct rise and run. Then you replicate that triangle down the stringer, pull out a circular saw and start cutting (carefully)!

[glitchc]

You need an angle finder to measure the angles between all relevant surfaces. Then cut the wood according to that.