Making the top sash fit

Today I put in some bronze strip weatherstripping in the top of the right window because I found out it didn't fit tight at the top when latched.  I had to glue a strip of wood to the top of the sash, but the piece wasn't thick enough.  Here's a pic of the sash.

 
Here's a pic of the weatherstripping.  I'm preparing it by dimpling the nail spots with an awl every 2 inches.
I'll have to say nailing this stuff on in tight areas around soft painted wood is a pain in the you know what!
I had to use tape to place it.  The dimples help a lot.  Hold the nail with a pair of needle-nose pliers and start it with a small hammer.  The nail is so close to a painted parting member that a spike made for fixing cars and bigger hammer was used to get it flush.  A nail set was then used to counter sink it a bit.  Hammering in an upward direction made this piece very hard to install.