Thought of the day .

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Well, did get that step done today. I probably have 5 hours in that one step including modifying the back face to remove the angle. I hope to get two done tomorrow. I have tow measures to compile and turn in, in the morning. These are an absolute pita. Three of the eleven are straight steps, the rest are Dr. Seuss. I'm the last image, my stick is still in place showing the line up tape.
The third image is looking at the bottom sides of the steps showing the seam locations.

 

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Here ya go.... New idea for marking where to cut the seam.
The president cut seam with line up marks is the starting point of installing a step that is patterned like I'm doing on this stairway.
Once the carpet is positioned then wrapped around the tread and stretched to the back of the stair, the next dilemma is how to mark the second half of the seam so it can be cut.
I tried this yesterday and it worked great.
I cut a strip of red rosin paper into thin strips, then carefully positioned the end of each strip against the cut edge of the seam. I stapled the strips hard enough that the staples almost cut through the paper.

 

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My goal was to transfer all these strips onto the carpet backing.
One at a time, I smeared a miniscule amount of hot glue onto one strip, then quickly wrapped the carpet into position on that paper strip and held it for a couple seconds. It releases from the staple easily.
I continued, one strip of paper at a time until they were all transfered onto the carpet backing. Now, just fold the edge back and cut dot to dot. Very fast and accurate.
4 more stairs to go.