Ummm guys.....just to let u know....that hacked engine is mine

The guy doing it is Stephen Wright of
WickedRS01
Its a brand new O.S. .21 VZ-B modified for U$200 off EBay.
I haven't started it - thank god - he wants me to return the motor for another new one with much better work/finish.
Should I just get him to give me a new STOCK VZ-B? I don't think this guy can mod a motor at all!
Your opinion on this Grinder?
P.S. Another guy from New Zealand bought a used modified VZ-B by him - didn't idle and is crap all not to mention running really noisy. Stephen is replacing that engine with a new RB 3-port though.