magnet

I've gotten tired of just taking my chances with larger models in the back of the truck so I have started this side quest to hold them down properly. This first set is for the tires that come with the XL planes. You will need magnets such as these for mounting. magnets I made mine from PETG...

I have strong neodymium magnets that I was planning to use on hatch covers and the like. Will that mess with my electronics? If so, where's the best place to install some ferrite rings?