snip...

--- I have been told that this all can be
done without dropping the tank.

yes it can.  tie a string to one end of the cross over y pipe before you
pull it out so you can use it to pull then new one back across.  a flat bar
helps in popping the y pipe out.  The grommets are easy to get to.  its
tight getting your hand under the frame but at 6'0" my hand fit and came
back out with out blood involved.

Jere
90 GL
88 GL