Mikel,
A CVD is a type of drive shaft - the one's that come in the kit are "dog bone" drive shafts (so called 'cause they look like a dog bone).
You didn't ask but the slipper is needed to control the extra power from the faster motor and protect the diffs etc.
As far as I am aware the belt tensioners aren't actually belt tensioners but bearings that sit close to the belt to stop it coming off of the drive pulleys. I don't use them, I also don't think that DCM uses them either.
I've had a look for you and you'll need the following Tamiya part numbers:
CVD - 54015 (front) and 54016 (rear)
Slipper - 54018
I'm in the UK but use a site based in Hong Kong -
www.stellamodels.net and not had any problems with them.
As for holes in my shell Mikel, it already looks like a sieve! I've got gearing issues that I'm working on (I think).
DCM - had an email from castle, as long as the motor doesn't go above 93C (200F) then everything will be fine (apparently
). They say the speedo can take anything the motor gives it. When it bursts into flames I'll get a Tekin..............