The F3 was the smallest of the Flatacrafts and was able to be set up in many different ways for different uses.
The Force 4 was the @12' RIB set up with 'Proper' seats not jockeys, two facing forward and two back. It had the Flat Fibreglass Nose.
The Force 4 GT was the same as the 4, but had the tubes extending forward to a nose more like we're all used to and could take a larger engine.
My father had a string of Force 4's whilst I was growing up. My first RIB was his last that I inherited when we lost him.
Below is a selection of old images of the Force 4's, the one I inherited was the Orange tubed one which I took the Suzuki 40HP off and dropped a Suzuki 55HP on to, which made it very quick
I really regret selling it when I brought the Ocean 6.5 I have now as I miss it's 'chuckability'.