I got the turbo to fit into ... or actually, on ... the VTF-2.3. It won't go "into" the port flare as will the Turbo into the VTF-3.3 and HO - and it is a bit nerve racking making sure it stays sealed.
The seal holds, but it is tenuous.
I used a hard back book as a spacer, and have the entire turbo unit placed "upside down" in order for it to work.
The turbo does enhance the performance, subjectively, vs. the unit without turbo in the one port setting. For example, in the Master/Commader scenes, the foot falls of the men running on deck hit more palpably.
The turbo is well worth the $100 extra, even with the 2.3 ... but I would spend the extra $$$$ for the VTF-3.3 without Turbo, as it performs at a higher level, and is an easier package with which to live.
Here is the M/C scene on the turbo equipped 2.3: