>> So it would be good to know if this is better than the previous versions.

Some good news and some less good ones... ;-)

The cannon :
- No more missing geometry in Modo ! Cool
- Normals of some faces still pointing in the wrong direction (Modo) I had to flip them manually (or use a double sided material).
- Not new, but once the vertices are merged some visual artefacts appear (due to smoothing). Most of them disappear when I change the smoothing angle of the mesh but I can't get rid of some of them (Modo, Hexagon, Vue)

The church :
- Some missing geometry in Modo (mostly pieces of the ground)
- For some parts, it seems that two polygons (or two objects) are created for the same faces, pointing in opposite direction. It's also the case in the Demo version of Cinema4D 9 but it's less noticeable there as it doesn't generate visual "problems" on screen.
- Face with inverted normals as for the cannon
- I could not merge the vertices of the model in Modo and Hexagon. Both programs have frozen and I had to kill them.
- Same smoothing artefacts than for the cannon

Just let me know if this is clear enough. If needed I can send some screenshots tomorrow (or maybe record some Wink presentations to explain the problems I encounter)

Cya