Foamed ceramic pistons?
In production anywhere in the World?
Can you get on the phone and order one?

You could also make the thing out of beryllium, but then there might not be anyone around in a year to do the warranty work.

I will reserve my conclusions until the BME 110 is actually in production and people are flying the thing. Then we can all speculate some more on the future arrival of the 55 and how close it will come to meeting the design target.

The DA-50 is also just hitting the streets now. Let's get some feedback here from the pilots before everyone pronounces it a winner or a loser based on the reputation of DA alone.