At the same time, the design of the Novakool with the compressor down below creates a natural Venturi effect & moreover, you have overkill with your venting.
It looks like a Novakool R3100 will fit easy and will outperform all your expectations.
Plus you still have room for some extra cladding if you so desire.
People had me turned all manner of ways until I put my Fridge in & realised, most of it is fearmongering, nitpicking, etc.
My Unit has run effortlessly for 18 months, woukd NEVER EVER GO BACK TO A 3 WAY.
I woukd have chosen the Vitrifrigo AR full price or the discount IF it had fit but there was simply too much critical woodwork changes needed.