As I understand it, there are two basic ways to take care of the issue.  One
is to apply a single valve in the common line from the reservoir, blocking
the return flow and the other is to use dual valve between the master
cylinders and the brake cylinders.  The second is apparently sold by Lancair
and the first is apparently more commonly used, especially in RVs.  The
first method would seem to be lower in cost and lighter in weight, but might
be less effective as there is more compressibility involved.  Any comments
on which is better?

Gary Casey
ES #157 ready for brake lines