John Stricker wrote:

These conversions AREN'T certified.

No engine installed in a homebuilt is.

In effect WE are the certifying entity and as such the
responsibility falls on us and we can't make that decision
with glossed over reports of "trouble-free" service.

I agree absolutely. I also realize and accept that
the developer is hardly an impartial observer and
is likely to sugar-coat their results. I'd never
buy an airplane or an engine (certificated or otherwise)
without digging deeper than a website. I'll never be
the first to buy or fly.

Dave 'caveat surfer' Hyde

Lycoming-powered RV-4