Ron, Mike is correct you have made cardinal Sin #1 by buying before the design is finalized. STOP and cancel if possible because you are heading for a dissapointment.

Some of those parts are a bad choice for a router and will affect performance badly. For instance, 5mm pitch is too slow for a router, 10mm is much better and will allow you to reach the feeds you'll require for cutting MDF/Ply correctly. With 5mm pitch, esp with those motors, you won't get any where near the correct feeds which will mean poor finish and excess tool wear.

Next those 2.2Nm motors are too small for 20mm screws and you don't mention the most important part which is the drives and their Max voltage. The voltage you run steppers at makes a huge difference to performance, like wise the spec of the motor plays a big role in how much voltage is required for best performance. The Nm rating is only one aspect of selecting the motor, the inductance rating of the motor is very important and plays a big part in how well it will perform at a given voltage. High inductance will require more volts to get the same RPM as a Low inductance Motor with less volts.
So if you have High inductance motors paired with Low voltage drives then you cripple the RPM which if combined with low pitch screws cripples the machine so badly it's impossible to reach the feeds required for cutting correctly.
It's a common mistake to think you can cut at any speed you like, the tool and material dictate the feeds you'll require, run them too low and you'll wreck tools and leave a poor finish.

I suggest you take step back and do some more research. Start a build thread and ask all your questions in that thread, this way you can look back in weeks or month's time and find any info which may have been given.

It's not difficult to build a great machine but it's very easy to get it wrong if you go blindly buying parts without knowing what or why your using that part. Look around see what others have used and then ask if your not sure about anything, then ask again before clicking BUY.