Crap chinese router problems

[JAZZCNC]

Charlie NC studio is load of rubbish and the Video is spot on best place for it is the bin.!!

The Man you want to speak to in OZ for parts is Peter Homann. Probably the best (easy) solution for that machine given your friends lack of knowledge would be G540 because it'all-in one board with speed control built in and peter is very helpful with advise etc. However that would depend on the Motors to some degree.
https://www.homanndesigns.com/

If want better then I'd look at Separate motion controller and decent drives. Can't stress enough that cutting corners on electrics is the worst thing can do so advise your friend to dig little deeper and do it correctly.
I know Boyan is in love with the cheap Offline controller but IMO they are hardwork and inflexible, certainly not something new comer to CNC is likely to get grips with easily. There's Zero after sales support or Info and very little is known about them compared to other controllers like Mach3, UCCNC, Linux Cnc etc.