www.ebay.com/itm/198390937981This is the trailer used in the older channel islands twin. It is more upright and less area but still 3.75, I find it perfect for thrusters in smaller surf or if you dont get your foot as far back as you should either due to ability or racing mushy sections.
Getting your foot behind the front fins is critical if you want to turn tighter on steeper waves otherwise you are fighting so much rail even on smaller sups the arc of your turn will always be drawn out.