It will work. It worked great with slot car proxy racing championship. Don't be afraid of loosing your teams in post services, if your package is well made and the adress is good, it will be delivered. It's easy to blame postal services...Very easy. But it works great most of the time.
Concerning the teams choice, I thought about it and finally think that we should not restrain to one brand or type. Just stick to a weight limit, and that is. Solitaire play is freedom after all.