How to build a jet engine HPST 2025, Part 1

Hi guys, just started a new engine build a few days ago. This one is driven by the second stage Allison 250 helicopter turbine wheel. The compressor wheel used is from a Mitsubishi Tf 15 turbocharger. HPST stands for High Power Suppen Topf (engl. High Power Suop Pot) Hope to get it done until Christmas :-) Andy