Seems like Jim is not watching this thread anymore...I am keen to try the same however due to the availability (or lack thereof) in South Africa of the tanks it will still be a considerable investment. While it may be cheaper than the normal aftermarket solution I am beginning to doubt if it's the route to go for my HJ60.
Aftermarket aux tank ordered from www.oot4wd.com.au. QED
Aftermarket aux tank ordered from www.oot4wd.com.au. QED