i am not sure were you are getting imfo but tower has them listed at the same price

http://www2.towerhobbies.com/cgi-bin...&I=LXJKT0&P=ML

http://www2.towerhobbies.com/cgi-bin...&I=LXRSJ8&P=ML

itis not that much of improvment but if they are the same price..

when i buy it i think, that i will sell the 18ss and buy a os .18 cvr.
but any idears were to sell the ss