Opinions on sexing this tinc?

Hey guys,

I've had this little guy/gal since last October, and s/he is my first dart frog. I've absolutely fallen in love with them! I am interested in getting the opposite sex to make a pair out of them, but I'd really like some extra eyes to confirm what I think. The person that i bought the dart from wasn't sure what sex it was, but I'm thinking that this is a female due to large stature and plump appearance when looked at from above. I am completely open to suggestions however. She is housed in a vivarium with an assortment of live tropicals, bromeliads, and vines as well as a fountain. Vivarium is nearly completely sealed with a glass top (the only ventilation is the small vents beneath the doors in the exo-terra terrarium, and a UVA/UVB full spectrum bulbs for lighting. Humidity is anywhere from 85-95%, and temps are stable at 71 degrees F. Below are pics, side view, and top view. An additional shot is included for a better view of the toe pads.
top view
http://i85.photobucket.com/albums/k7...t9/photo-1.jpg

side view
http://i85.photobucket.com/albums/k7...t9/photo-3.jpg

toe view
http://i85.photobucket.com/albums/k7...ect9/photo.jpg


Thank you for your help!