Upper window sash repair
I need to fix an upper window sash, my house was built in 1912 as far as I know. The lower rail has pulled away on a few windows and have looked on line to see how to remove the sash, lots of paint over the years, and I will replace the rail with a piece of wood that is identical but fits snugly, meaning I will have to cut to fit the joint. My question is, what is the best word to use? Someone told me most use fir. I guess I would get some number 1 fir to do this, but am open to suggestions. Also, I suspect the side rail may be rotted a little so the part that connects to the bottom rail may be bad, don't know until I get into it. Any suggestions on how to remedy this? I am thinking to do this on the weekend. I know you guys won't let me down on advice as you guys are uber-knowledgeable! Hope I'm not getting in over my head. I have all the basic tools I would need, ....oh. What router bit would I need for the internal edge of the window that opposes the glazing? I could just use a bevel cut for now, but if the local stores have the bit would definitely want it. Thanks!
Takoma Park, MD