RE: pos and neg shift???
...Hitec also makes some [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXCXM9&P=7]positive shift[/link] receivers that work with JR & Airtronics, and [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXN524&P=7]selectable shift[/link] and [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXKYK3&P=7]auto-shift[/link] receivers that work with both.