Vectored Thrust Questions

Hi All

I am new to this list, so I appologize if these questions have been
asked before.  

I am interested in playable Vectored thrust rules.  
I have looked at the trial "official" ideas from GZG.  
I have some questions:

1)  How long is a round ment to be in FT?  

The reason for the above is I want to calculate what sort of rotation
rate is 
feasable.  For big ships the angular acceleration can get quite out of
hand 
and rip the ship appart.  

2)  (More of a comment than a question) Given the distances involved in
FT 
I doubt whether small rotational thrusters could be used to signifantly
alter 
the movement vector of the ship.  Frex.  If the main engine was capable
of 
an acceleration of 6 then the 3(?) auxilary thrusters would have a total
mass 
of half that of the main engine to provide an acceleration of 1 in any
direction 
(except backwards).  

Actually, with the design of many of the FT models I doubt whether they
could
support accelerations sideways and their structure would fail...  

Imagine NAC CA (or more) with broken neck.  

Anyway, this is just a request for the current ideas on vectored
movement.  
What I want is a simple system which I can believe!  

Cheers
	Lewis