Looking in Singapore for Experienced X-Carver to help tweak my school's machine

Hi, I joined a local Singaporean school as the the Head of the MakerSpace and inherited a 500mm X-Carve. Someone else assembled it and it now is operational.

However, it is not functioning correctly [circles cut as squares, it either cuts too little or too much in depth]. Am looking to hire someone local that can help me adjust nuts/belts or calibrate x-y-z. I’ve been watching videos and navigating the forum but don’t have the time right now to figure it all out.

Please let me know if there is someone in Singapore that can help!

Thanks! Gayle