Hello from Derry!

[JAZZCNC]

20mm/min is very slow for wood. ..Clive

I think this is whats called an under statement Clive.!!. . .LOL.

Kevin if you can get a refund then I advise you to do so. No matter how much effort you put into it you Can't make silk purse out of sow's ear and it will always be what it is.!!

If you feel you have the skills to DIY then go for it because you'll get a machine that does exactly what you want and for much less than buying quality off the shelf machine.
It's not difficult if you go about building in the right manner. Don't be rushing into building, do plenty of research and reading others build threads. Find a design that suits your needs. Don't try to reinvent the wheel, there's no shame in copying any machine design you like. All machines are some hybrid of another in some way and there's only so many ways to build these things.!
Ask questions and when you think you know the answer then ask again just to be sure you really do understand.!
DONT buy anything until you 100% know for sure it's correct for your machine and again ask if not sure.!

Building isn't has difficult as you might imagine and Anything you can't make your self can be made for you by someone else if needed. It may just cost you a little more but you'll still save in the long run and end up with a custom machine designed for your exact requirements.

Good luck which ever direction you take.!