It didn't take me long to figure out where to place the muslin, it
just seemed to flow onto the hide naturally. Observe:
The only thing i needed to cut two of that there's only one muslin for
is the smallest piece in the picture, and the piece at the bottom right
(the collar). Those two pattern pieces would get two copies from the
leather and sewn together making double-leather pieces, since I don't
need a lined collar, and the support for the collar (the smallest piece)
is always double-leather. Not to be confusing, of course. ^_^

I used a dry-erase marker to trace the muslin pattern. Cheap, yes, but
I've already spent so much... Anyway, if Imake any mistakes, I can wipe
it off within half a minute (so I found out), but it's completely permanent
after a minute or two. This is part of a sleeve (presumably the left,
I think).

Okay, so here's the full left sleeve (I've confirmed) drawn out on the
leather. A front panel is to the bottom of the picture, and awaiting
its tracing.
After I traced each piece, I cut it. Dunno if I should've done it any
other way, but that's my way. >:D Anywho, I traced and cut out all
the pieces and draped them across my chair until a few days after Christmas.
Then I got to work...
--> The
Lining and Batting