G-boosters were evoJet engines marketed by Graupner (and they were also much more expensive). Graupner has recently run in to some financial issues and was unable to fulfill their obligation. Since Graupner was not able to buy enough engines, evoJet began selling direct at the end of last year.

The evoJet engines are the newest generation and have improvements over the G-Booster engines. Turbo Didi is a part owner of evoJet and obviously is involved.

Let us know if you have any other questions.

Chad