TOPIC:

Does anybody cut his own carbon plates?
Makes sense?

I would like to build a 4WD mix from the FF04 and XV01 whit 260mm wheelbase - all parts are present

As long as you have a CNC machine, the proper bit and the plan it is super easy...

no CNC, no plan
just a mini-table saw, a caliper and a "dremel" (multitool)
i'll try...

Have done it in aluminium, see my DF01 Lunchbox.

Cover the plate with masking tape, draw lines and locations for holes. Drill with 1.5mm drillbit  to get more pecise location.
Cut shape, englarge holes and remove masking tape.
At least that is how I would do it...

If the orginal plate is flat it easy to copy.

Have wondered to do the same, but carbon plates is silly money now. 
My LHS sells 2.5mm carbon sheets at 69 dollars (250x400mm), usually out of stock.
3mm is 500x400mm at 86 dollars, also sold out....
Kit money imo lol.

interesting... at my carbon plate dealer (german amazon), the chaepest 300x400x3mm actually is 41,99 EUR (dont know the change to dollars)