Recycled Sweater Longies-Crotch Gusset Details

I had some people ask about how I came up with the crotch gusset in my recycled sweater longies, so I decided to use paper models to sort of show what I had done.
The red stands for the sweater and the yellow is the pattern. (Both are in half since the sleeve is already sewn.)




This shows the sleeve cut off from the sweater.




Here is the pattern.










When I laid the pattern on the sleeve, the sleeve was narrower than the pattern.







I cut off the part of the sleeve that stuck out from the pattern.
This shows the piece I cut off and the part of the pattern that isn't covered.

I cut the seam of the sleeve down to the level of the point of the crotch on the pattern.










I discovered that the part of the sleeve that I cut off is the right angle for the rest of the crotch seam.












I cut off the part that went past the crotch point.














I traced that piece 4 times (or twice opened up) to come up with a start to a pattern for the gusset.











I cut it out, rounding it out as I did.










This shows the actual piece of the sweater sleeve I cut off next to the gusset to show that the gusset isn't quite as long as the piece I cut off. (since this is the one I didn't use as a pattern, it is the original length)

















This shows the placement of the gusset for sewing on. The middle of the long side matches up with the seam on the sweater sleeve.








The actual pair of longies with the sleeves/legs out to the side with the gusset in the middle. So the left side is one sleeve and the right side is the other sleeve.
I basically just sewed the gusset into the part of the sleeve where I had cut the seam to reach the level of the crotch point.







The girls came over to see what I was doing and Sarah thought it was cool that she could see things in the camera "window". She wanted to take a picture of Emily (who was on the other side of my lap)






Here is her picture of Emily.




















And her picture of me.












Then she wanted me to take a picture of her.














I figured we might as well take a picture of Will, too. He was asleep from a recent trip in the car.