Silhouette CAMEO 4's high pressure carriage offers a ton of benefits (hello rotary and kraft blades!!!), but also sacrificed a couple of techniques a lot of users got used to on the dual carriage CAMEO 3 and Curio.
Just like with the single carriage Silhouette machines, it's not possible to do a multi color sketch (with two different color sketch pens), foil and cut, or a sketch and cut in a single pass with CAMEO 4. This is because Carriage 2 is exclusively for the specialty tools. That means sketch pens and the sketch pen holder won't fit. But the good news is, it is still possible and just an extra step or two.