Newbie who needs guidance how to print cassette player gears and idlers

[hdtvjeff]

I enjoy the feeling of doing it myself.I repair 1970's panasonic stereo cassette decks and wish to make substitute parts since these parts have not been available for 50 years.I dream of the day most metal parts can be replicated.Setting up the 3d printer soon.Just worried about the hot bed and my cat jumping on it !Again, thank you for your time and patience