Your manual attachment is correct and notice the mid/low range is on the left side of the engine on the fuel inlet cone and it is not on the right side of the the engine in the throttle barrel/throttle arm such as it is on all the FX engines and that is what you implied earlier.

There is no comparison to the FX carbs that you suggested and I have repeatedly watched folks stick a screw driver in the throttle barrel thinking they were adjusting the mid/low range.

This simple error that is common with bench committees needs to be pointed out and cleared up before suggesting someone has a defective engine and needs to be sent back after only two runs or whatever you orginally posted.

John