Third Graph Mounting Options

[TommyToon]

I am looking to mount a third graph on my 520 C Ranger. I currently have the dual BBT mount on the bow and want to keep it but am looking for a way to mount a third graph. I was looking at doing a Geiger Tech or TH Marine single mount but do not have access below the deck of the boat to thru bolt.

Can anyone share how they have mounted a third graph without a new triple mount?

Thanks!

[A Wood]

So my buddy added a third graph by taking his lower unit off his double and having a piece of aluminum made to bolt to the same holes but it is wide enough to mount 2 side by side on the lower piece. His is skewed a little to the right to allow for the tm to pass by. Cost him $15 at a local machine shop and a few bucks for longer bolts. Now if only his batteries would hold out running 5 graphs...

[TommyToon]

Thanks. I considered that and may try to make a wooden template