Hello

Should the CatalogContent (ProductBase), be in admin/Pagetypes?

  [CatalogContentType(GUID = "B5DC4034-D266-439E-8204-B09AE715E9CC", 
        MetaClassName = "Hardware_Product_Class",
        DisplayName = "Hardware product",
        Description = "Create hardware product",
        AvailableInEditMode = true)]
    [ImageUrl("~/Static/img/PageBlockTypesImages/product.png")]
    public class HardwareProductContent : ProductBase
    {
        [CultureSpecific]
        [Display(Name = "Model", GroupName = "Content")]
        public virtual string Model { get; set; }

    }