Is anybody able to measure the width of the cowl of the Venus II in line with the cylinder head of a 1.20AX?

I have a 1.20AX with a Jett Engineering Turbo Jett in-cowl muffler, which mounts to the engine in the same way as a pitts muffler does, with the engine on it's side.

When mounted, the top of the round shaped muffler is below the top of the exhaust port, and the diameter is 88mm (3 1/2").

I've been wanting to buy a Venus II for a long time and finally have the funds, so i'm just gathering all the required components and would like to be able to use my existing engine/muffler combo.

From the pics in this thread, it looks to me that the 1.20AX exhaust port is within the cowl when mounted horizontally. If the cowl is more than 3 1/2" wide at that point then my muffler will be a good fit.