[dale_glass]

> I think their main problem is that regarding the i3 design, they are pretty much the only-ones contributing to improvements, I mean - when was the last time the community (or another manufacturer) actually contributed anything useful to the core HW and electronics design?

There's lots of i3 clones with various changes that are open. But that it exists doesn't mean it'll be incorporated.

I've seen for instance multiple i3 clone designs with multiple extruders -- one with them side by side, another one with two extruders on the X axis.

There's also all sorts of construction alternatives -- wood, laser cut metal frames, etc.

The issue may be that lots of the clones are mostly minor branding/advanced feature changes. Prusa as far as I know doesn't offer an IDEX printer. I'm sure they could take one of the existing designs, but perhaps they just don't want to because it's an unusual, fiddly feature.