As I showed you in my previous post, the tenon's inside the mortises overlapped due to their length. I decided to go with an interlocking tenon (i.e. a finger joint) to add some strength to the over all assembly. I'm sure it wasn't necessary but it was simple to do and didn't really add much additional work.
Now it's time to add another bit of over engineering. I want to pin the tenon's into their mortises with dowels. I will put two dowels into each tenon which will give the joints a mechanical lock in addition to all the glue. I used my brace and a bit to make the holes. I first clamped up the base so that the pins would help pull the joints tight.
After all the pin holes for the dowels were drilled, I cleaned up the joints a bit with sand paper and a lot of blowing and trying to get all the remaining bits of wood dust and shavings out of the glue joint.
As with most glue ups, they start off nice and slow and easy and end up frantic so I don't have any pictures from the actual glue up. Here is a shot after the glue up was finished.
I have done a rough sanding with 80 grit and cleaned up all glue squeeze out. My next steps will be to build the second desk base and then work on the interior drawer slides/support.