Quadra Aerrow started up again.
http://www.quadraaerrow.com/quadraaerrow/default.asp 40-1 mix works well. Q 50 mount is the same as 42. Can be updated to CDI ign but you would have to change the flywheel too. better option is chainsaw shops have a module called Little Atom that replaces points on any chainsaw for a lot less money and they work well. Hope this helps.