The BME Yak's are coming in at around 10 pounds out of the box and around 17 pounds all up. But that is with CF stuff. If you built yours with the aluminum stuff provided you would be around 19 pounds (with a DA, ZDZ, or BME, 50cc). You could easily be at 18 pounds with CF stuff. With some other measures even at 17 pounds (CF/balsa firewall, one big servo for elevator using pull pull etc).

Oh yeah, is that wing area of 1450 squares accurate? The BME seemed to fall short of what they claimed. If your wing area is what Lanier said that thing will float like it's filled with helium (even at 19 pounds).