First I had to line up all my holes etc... I had these made with a 5/8" BSP opening at the bottom side to the rear of the tanks to allow for joining the tanks together. They also have a 1/4" BSP at the bottom rear for a fuel pickup, or a drain valve depending on your preference.
I will be joining the tanks together with Goodrich braided hose and Ally connectors to give it a tad of bling. Because I am doing this, I will pick up the fuel from a T piece between the tanks, reducing from -10 braided hose to -6, which will be easily sufficient for the fuel pumps.
I have had to butcher a large opening in the top front of the sponsons where the fuel filler and breather were in order to have a large enough opening for the pipes to pass through into the new tanks.
Also, as I am joining the tanks, I have made a blank for one of the sender holes, as I will only need one fuel sender.
Now that these are (hopefully) permanently mounted, I can make the covers for the front wheel well and the covers for the filler / breather area in the cabin, which are a requirement for IVA testing.
The design has been well thought out by Mick Sollis at SouthernGT with mounting points and accessibility being well thought out.
Enjoy the piccies.
Graham.