So BusBoys@aol.com says:

> 
> Originally, 80 to about 83 Westies had a Two Stage Regulator that was Round
> (in fact it was also used on the 74-79 Westies as well).  Starting in 84, the
> Regulator changed to a square style due to Federal Regulations dealing with
> Motorhome-type gas appliances becoming more stringent to promote safety.
>  Either is interchangeable, but I strongly recommend upgrading to the Square

So what makes the square valve safer than the round one?

Steven 
Sacramento, CA
sjohnson@pcocd2.intel.com