The Dro can be retrofited its available at
http://www.littlemachineshop.com/pro...ProductID=2222
Yes if you can aford it go with the bigger machine.
It will do everything the smaller dose and some the smaller can't.
It is very comon for a job to come up that requires just a little bigger then
what your machine can handle.
You too will run into this on occasion regardless wich one you get.
Good Luck