Help with promenade jacket pattern...

Has anyone worked with the free patterns from Tudorlinks.com? Particularly, this one:

http://www.tudorlinks.com/treasury/freepatterns/pe187604wpromjackpatt.html



It is just what I need, but I've never worked with a pattern I didn't cut out in "my" size. How do you enlarge and get the curvatures right? Is there a trick, or do you just guesstimate? I don't see anywhere when it might mention what size the "original" pattern is, so I don't know if it's waay too small or waay too big. I suppose, unless someone has already worked with this one, I'll have to make a muslin and find out!

Does the collar look to you like the collar for the TV 405 1872 Vest Basque? Without instructions, I'm lost, so I need all the help I can get!! If it does, then I can use the instructions from that pattern to help me put on the collar.

I appreciate any tips and tricks!

I plan to make it of black wool (if I can find any at Joann's) and a brainvelvet edge trim, and line it with some quilted satin. This will go over the brocade gown I recently made :)

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And thank you for the previous help with the hat question I had!!!