Just as a comparison...

Roland E80 22.5 kg / 49.10 lbs
Roland E60 13.0 kg / 28.11 lbs
Roland G70 20.5 kg / 45.4 lbs
Korg Pa2xpro 18 kg / 39.68 lbs
Korg Pa800 13.3 kg / 29.3 lbs
Korg Pa500 9.9 kg / 21.8 lbs
Ketron Vega 16 Kg / 35.2 lbs
Yamaha Tyros 15 kg / 33.06 lbs
Yamaha MOTIF XS8: 28.6 kg / 63.05 lbs
Yamaha MOTIF XS7: 17.0 kg / 37.47 lbs
Yamaha MOTIF XS6: 14.8 kg / 33 lbs

I can't believe weight would be an issue if the rest of the board was so outstanding.