This is not the right place to make a split. It would be better to create some top level groups and then have forums within them.

Suggestions for top level groups are:

Building (warbirds, kits, arfs etc)
Engines (include support forums, glow, gas, giant, etc)
Electronics (include batteries, radios, servos etc)
Flying (warbirds, kits, arfs, IMAC, pattern etc)
Crashing
Selling
Wanted
and so on...

Regards,
Craig.