You have seen this right ???
http://straightrazorpalace.com/works...wers-here.html
Here is a very easy tutorial that Icedog did
http://straightrazorpalace.com/works...og-method.html
A lined wedge
http://straightrazorpalace.com/works...ned-wedge.html
An entire restore with a lot about wedges
http://straightrazorpalace.com/works...r-restore.html
and a Vid from Undream
http://straightrazorpalace.com/video...rt-finish.html
Some things to note,
Start the wedge material at a point less than the thickness of the tang of the razor then taper down from there, you do not need to figure out that taper, contrary to what some believe take it to sharp if ya want... When you lay the scale on it you can slide it back to where you want the angle to be :) this is what Icedog is showing you very well in his. Then drill...
I have always recommended starting at 1/2 the thickness of the tang, but that is for ease of fitting not because you have to..
Watch the angle of the wedge from top to bottom,, it can get off there...
Watch when you are using power tools and a meltable material as you can warp it
Watch when doing metal wedges as the biggest mistakes are burning your scales or not enough taper
Read and listen to those links as there are tons of tips in there that you will miss by rushing through them...
And the most important hint of all,, Look at the old vintage razor you are tearing apart BEFORE you tear it apart if at all possible as those guys are smarter then all of us, and knew a bit about making razors, balance, flex, and function, correctly...