A job rarely falls neatly inside one technique. A housing can be printed, but the shaft has to be turned; a prototype needs a smooth SLA finish while the bracket under it belongs in composite. Sort that out yourself and you call three suppliers, get three lead times, and get to work out who is right when something does not fit.
Here it goes differently. You explain the job once. We make what our own machines can make and place the rest with fixed partners, under the same requirements as our own work. You get one point of contact, and we watch the quality across the whole job, from first question to delivered part.