For the Venus this pilot did not put the battery in a strange place !
But took easy route, behind servo tray and #3 bulkhead , under the contol rods.
He then add 4 oz of lead under the tail stab too balance out that 65 la .
With stock fuel tank he was landing in less than 10 minutes of flight time.
Of course flying WIDE OPEN THROTTLE.
Light plane alot of speed.

Frank