if you do want to use a tool you can buy a ofna bearing puller kit from A-main hobbies i think by memory its around $55 usd it does the same thing with out the pretty packaging and rip off price tag .....

but the oven is free , you can use an old crank if you want to help in stall the bearing with no problems at all ....

i putting some Answer ceramic bearings into my engines next week ready for the nationals in my truggy