I don't think I will add concrete blocks to the shop, but I'm open to adding concrete powder, just so you have to take the time to turn them into concrete and not instantly get concrete, adding sandstone is also fine. The reason why we haven't added /craft is because it was originally an extra on the "Extras" category on the Webstore. I don't know whether we'll add the extra back or if we'll add it to a rank yet.