How rattle free is your board and how you achieved that?

[b264]

Don’t use batteries too big for your enclosure.

Don’t use enclosure too small for your battery.

Also this

@b264

If I could be of assistance, it would be to choose your items in a certain order. Don’t choose anything else until you’ve chosen your deck and enclosure. Because you need to know if it will even fit. Enclosures are much more difficult than you think, and you need to know if flexibility will be something you design for, or not. So go in a certain order, along the whole way making sure you choose things that are compatible with each other.

1. helmet
2. deck + enclosure (flex?)
3. battery (flex?)
4. ESC(s)
5. drivetrain & trucks & motor mount
6. wheels
7. motors
8. {everything else}
9. remote
10. aesthetics: grip, colors, lights

Leaving enclosures until last as an afterthought is a surefire way to end up in a less-than-ideal position.

It’s my personal opinion that if you need a gasket, (besides butyl tape that squishes out) then something isn’t compatible.