Who wants to try a turbocharged V12, just to up the ante? 
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Lol. Let’s up the ante some more & make a turbo-fan or turbo-jet in scale.
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I think the problem with axial-flow gas turbine engines is that they don’t scale down well. Something about the air no longer behaving properly as there isn’t enough of it to compress. The radial-flow jet engine guys went the direction they did for model jets due to this.
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Very impressive machine work. Balancing is a challenge for anything turning 95,000 rpm.
Wonder if if got the blades and vanes from another engine or machined them.
I saw a reference to wire EDM for the “go fast” parts.
Just designing the airfoil geometry is quite a trick before it can even be EDM’d.
A centrifugal compressor would be easy to get from any HVAC blower system. Clearance losses than from a comparable axial compressor of the same size. The challenge would be fabricating the combustion chamber and selecting an appropriate turbine section (two if its a turbofan).
Single crystal has been for a while. Pratt & Whitney had them when I was working there … 12 years ago.
http://newsroom.pw.utc.com/2018-02-21-Pratt-Whitneys-Single-Crystal-Turbine-Blade-Named-Historic-Mechanical-Engineering-Landmark