Yeah, it's sillly, it's not really an issue for me to boost that up to 3mm, the bigger problem is that I have to repeatedly reorder it just to wait two days and additionally a weekend and see it canceled again for yet another reason.
I'm currently mailing with Maartje for this (was mailing with Kevin last week though). From the way they talk, it doesn't seem to be the CS guys canceling it, but some other 'colleagues' somewhere, and that the CS just relays their cancelation reason?
It certainly doesn't help in getting things ready in time.
Just so you know, apparently it's no longer allowed to trap unbinded material powder in full color sandstone prints, because supposedly the wax doesn't dry properly and the print will break.
Although, I do have a color printed figurine here that has material trapped, was printed without any delays, and is strong enough that I can even bend the legs by 1mm without any sign of anything breaking.
You now have to provide holes of about 5mm at least.