Personally i use both hands to voice the chord and alternate the each hand. For example ...play the root and the 5th with the left hand and 3rd and oct with the right. (or 3rd and 7th etc). Alternate the hands to make the strum sound. This works good for a song like "things we said today" by the beatles that has a fast strum. With others...like Josie by steely dan...I use and open voicing with the right hand and alternate in a similar manner but just with one hand. Both techniques work well. For fuller sound...say on "ventura highway" by america...record another track...on psr2k use the 12 string on one and maybe a reduced volume chorus guitar on the other...or nylon...you can mix the volumes later tho. I've recorded many like this..."you've got to hide your love away" by the beatles is an example.