Learned about this pre-print online from the Insect Genetic Technologies Research Coordination Network (see "technology tips" section).
Describes use of fluorescent tagging to more efficiently identify successful knock-ins, then RMCE to change the knocked-in cassette.
Xu Zhang, Wouter Koolhaas, Frank Schnorrer. A versatile two-step CRISPR- and RMCE-based strategy for efficient genome engineering in Drosophila. doi: http://dx.doi.org/10.1101/007864
Pre-print is available online: