Nice Work... Thanks for the tip of using discarded bed frames. I have one of those leaning up against a wall here...
My tongue area already has two angle sections welded across the tongue area and I have had three GP24 battery boxes using those angles. They stuck out just an inch or so on either side.

Roy's image
I am currently planning on installing a TORKLIFT battery box that is 59-inch wide using those same welded on angles and this will stick out across the tongue area over a foot or so on each side... This box will align up with the second upright wall section on the front deck on both sides in the above photo. If this doesn't look good to me for support of the box I will have to put different angles in place on top of the tongue area.

Google Image
I believe it will be OK for me however... The TORKLIFT box fits perfect inside the two welded on angle sections...
You will be facing the same problem if you ever want to increase to more batteries in the future...
Roy Ken
