hey MT2 guys.. question. Im slowly upgrading my drivetrain to 18SS+ specs..

i dont know what size cvds i need.
http://www.hpiracing.com/piw4.php?part=86303
or
http://www.hpiracing.com/piw4.php?part=86304
?

and
http://www.hpiracing.com/piw4.php?part=86305
or
http://www.hpiracing.com/piw4.php?part=86306
?

then two of these: http://www.hpiracing.com/piw4.php?part=86336 and that's it right?
or should i worry about the center dogbones?