Need help brushless spindle DIY !

It isn't hard to make an unregulated PSU.

www.ebay.com/itm/24V-LARGE-POWER-TRANSFO...d:g:AI4AAOSwrhBZCRLN

+ rectifier + capacitor.

Can you give me some schematics?

...Meanwhile.....
I wasn`t patient enough to wait someone to answer my questions about esc ...so,
i bought this items :
ESC
Mystery Firedragon RC 80A 2-6s ESC for helicopter BEC UBEC U-BEC Brushless
Servo tester
Professional TECH Electronic Speed Controller ESC EK2-0907 Upgraded Servo Tester | eBay

i think the psu will be 2x old atx (12v/30a)+ battery(~80A)...
What you think about ESC and PSU combo?
Cheers!

??? someone...please help...
1. i need to know is my ESC purchase good?
2. Is psu+ battery combo good? I was reading somewhere about this but i don`t know how to connect , so please some schematics or tutorial.

if i droped voltage on psu to 22v?

I`ll use servo tester for beginning this build. Later, if everything works good , i`ll hook this esc to arduino with display to show me the rpm, and this arduino to another " main" arduino+ cnc shield. But , that is my noobish idea for latter on.
At least i saw this esc controled by arduino + display rpm video on youtube.

The motor is declared to 3-8s. Is there will be some problems?

Sorry, i wasn`t clear enough. Motor is 3-8s but esc is 2-6s (22.2V) , and the psu is 24v.
You said that 24V would be problem.
So if i lower voltage to 22V... would that be a good combination?