Small Aluminium boat

See this 5.1m Aluminium catamaran hull for reservoirs.
Length = 5.1m
Breadtrh =1.10
Depth =0.5m
OBM Power = 2.0 h.p

All welded craft. Contains 4.7% Magnesium.
I am palnning to increase the breadth of this craft, and length a bit to suit the form.
All comments are welcome

 

Is the aluminum hull in the photos designed as one-half of a cat? Or is it meant as a really slim monohull? 5:1 length/beam is rather slim for a mono this size, but pretty fat for a cat. Are you planning to split it down the middle to widen it?

 

Monohull

Thank you for your interest.
There was some difficulty in getting a keel section at center. And welding very close may create trouble.So I wanted to fabricate keel from plates. The hull was made like a slim cat. But it is very sensitive -- rolls. It was difficlult to weld a bilgr keel also.
I am planning to widen at center and provide some more volume at sides also. The final breadth would be 1.8- 1.9m