Hallo,
ich bin der czhunter aus Shapeways.
Entschuldige mich, mein Deutsch ist sehr schlecht (obwohl ich gut verstehe, ich kann nicht sprechen oder schriben), so ich werde auf English antworten
So:
1) The materials. I usually offer FUD/FXD (Frosted Ultra Detail / Frosted Extreme detail) and BHDA (Black High-Definition Acrylate), when possible (sometimes not because of the bounding box etc.).
Both of these materials have some advantages and disadvatages, sadly none of them is perfect. BHDA has more precise details, is easier to work with (cutting, drilling, gluing etc.) - is more similar to polystyrene from plastic kits. That is the good thing. Bad thing is that it is quite "soft" and on bigger flat surface has tendency to warp, and the second thing - there some amount of hand work involved in removing supports, that sometimes makes scratches and stains.
FUD/FXD is harder and tougher material, little bit harder to work with (something like PUR). It has to be cleaned from wax support (that makes lower quality surface on the spots, where it is touching the model), but it is geometrically very stable.
FUD and BHDA have very diiferent pricing formula (BHDA is only about material volume, FUD is a lot about machine space, height etc.), so sometimes, the prices are very similar and sometimes very different - it is very hard to guess when modelling
2) About the Gisela in H0 - to be honest, I work in some kind of chaos, so I don't know (remember), why G1 is not in H0. Maybe it is because bounding box of whole set, maybe I just forgot to make it. Have to look again
3) About ICKE's interior/bogie. I know Aziz - the modeler od ICKE shop. His work is connected to mine. My primary scale is N, so I don't have power and time to develop stuff for other scales. Aziz told me, that he can try to develop it himself, so basically yes, it _should_ fit together, but is not yet tested. When Aziz will get the bodies of my trains (should be today), he will test how it fits together. It would be great, if it was possible for more modellers to put models in one shop - sadly, it is not possible, so it has to be done this way (bodies from one shop, other from other shop).
4) Yes, from time to time, there are discounts. Something on Black Friday, sometimes there is free shipping, sometimes discounts on selected materials. Usually 3-4x per year.
5) I have some photos of H0 scale BHDA F79, but can't put them here (25Kb limit?). So I have to upload theme somewhere else, what I can't do now.
Best regards
Martin