Magnet question

[StepwisePilot]

So, looking at the Jain Zar model I built, I doubt this thing would survive my padded carry case. As such, I'm thinking of putting Magnets underneath the base, as well as a metal baking sheet to them place the model on. 

Anyway, what kind of magnets are needed? I've heard of something called rare earth magnets, is that what I should get? 

For those of you that do this, what size and strength do you use for the purpose of bases?

[Jack Shrapnel]

rare earth magnets... 6mmx3mm is usually good

[StepwisePilot]

Thank you.