I’m afraid that we’ve shifted from the DeWalt as an option you can include to DeWalt as 3rd party option one must source oneself. The stock mount is 69mm though and fits the DeWalt, so as long as you can pick one up you’re fine.
Rather than a 1/4"–1/8" adapter I’d recommend a precision collet (or a pair of them): http://elairecorp.com/dewaltroutercollets.html#dwpanchor
Other things:
- endmills (one is included with the machine, but they’re consumables: https://shop.carbide3d.com/collections/cutters/products/201-25-end-mill-cutter-qty-2 ),
- If you wish to do small-scale or precision work smaller endmills (https://shop.carbide3d.com/collections/cutters/products/102-125-flat-cutter-qty-3 ).
- If you wish to do 3D or work with rounded bottoms you’d need ball-nosed endmills (https://shop.carbide3d.com/collections/cutters/products/202-25-ball-cutter-qty-2 )
- and if you wished to do V-engraving or angled joinery a V-bit (https://shop.carbide3d.com/collections/cutters/products/301-50-v-bit-cutter )
- a place to set the machine up (the Shapeoko is more suited for use in a shop environment),
- dust collection suited to the material which you are cutting (at least a shop vacuum — many of our customers rig up dust shoes and formal dust collection),
- workholding (some way to hold the material in place — we have clamp designs: http://carbide3d.com/docs/tutorials/shapeoko-clamps/ ),
- material to cut. (tools to break down stock will make this more affordable),
- Safety gear as noted above.
- A good quality square, a digital caliper (inexpensive plastic is a suitable improvement over just a ruler),
- paper and tape, plans for Projects,
- a vacuum,
- and possibly Dust Shoe,
- and tools for post-processing stock (a deburring tool is handy for metals and plastics),
- and if need be suitable hardware and supplies to finish them. See Considering Shapeoko 3 and http://www.shapeoko.com/forum/viewtopic.php?f=7&t=5626#p41942 and http://www.shapeoko.com/forum/viewtopic.php?f=7&t=2325#p17646