An optical printer has a DMD as a spatial light modulator. Via user interface of such a composite application, an end-user wants to access different combinations of existing services in different usage contexts. , a cellular service provider or a web advertiser. The apparatus further comprises a lower mandrel having a fourth plurality of wedges that engage with the second plurality of wedges, and a second cap configured to engage the lower mandrel, wherein the second cap contains an opening that has the lower mandrel disposed there through.