Direct Drive vs. Idler Drive vs. Belt drive


I'd like to know your thoughts on the strengths and weaknesses of each drive system. I can see that direct drive is more in vogue over the last few years but is it superior to the other drive systems? I've had first-hand experiences with two out of the three drive systems but looking to learn more.
128x128scar972
Generating ''new words'' by adding up phoneme. There are
''left hand''- and ''right hand'' methods
The Romans were left with ,say, RES on the left side and addition
on the right side. ''We'' are the right hand 

RES- nulius (property which does no belong to anyone; free)
RES- sacre  ( saint objects)
RES- immobiles (movables)

PROPERTY- movables, real estate .etc.
ELLIPTICAL- ''super''  and other kinds. 
 
A kind of word ''root '' is assumed which can be modify by
adding some phoneme to the right or left side of the ''root word)
But I have no idea how this works in Australia (grin).
Addition, the problem by ''Australian English'':
Australian ENGLISH,
New Zeeland ENGLISH
American ENGLISH
British (?) ENGLISH 
Our forum ENGLISH
Raul's ENGLISH, etc
BTW deed anyone in our forum try to put together LP 12 from
''original parts''? Is any improvement possible without
changing some parts? Are those than worthless because
of the lack of original parts? 
 
Our dear member whom we assumed to be an ''former member'' is
back. Welcome back thuchan!
Lew congratulation with your new compressor.