The Guzman Boeing 707 package has 9 different models.

There is also a Sentry model but it has no radardish on top of the aircraft and as far as I can see that model is no different than the VC-137C model.
However, the .mdl files of these 2 models do differ in size.

Does anyone know whats going on?
Does anyone know if there actually is a Guzman 707 Sentry model with the radar dish?

I listed the differences in all the 9 models here: