Your frame looks good!
Now is the time to do a couple of things:
1. Go though every slot and check to see if you have the correct amount of insertion nuts and verify that you know what those nuts are for.
2. Square up the frame. Use a good square and get it as close to perfect as you can. also make sure that your spacing between extrusions is the same all the way around.
A bit of precision now can save you a ton of frustration later.