http://intl-outdoor.com/17mm-to-20mm-brass-ring-driver-adapter-2pcs-p-804.html
An AK47 driver (17 mm) has 2/3 mode options, selectable via soldering the stars on its backside.
DD/FET will overheat a single XML emitter. You can mod an AK47 into a FET driver comfychair-inspired quick+cheap+lazy single-sided 17DD FET-driver (poor man's nanjg92)