Originally Posted by
veganbikes
Yes you could use the wrong shifter and make it work. Would I, no especially when the proper shifter exists. The reason you DON'T use the wrong shifter is you have to lock out so it doesn't make that third shift which most people would know would go outside of the cranks which is bad and overtime you are likely to break that lock out and you have the problem.
That's a total non-issue. How do you think the derailleur is going to get in the third position when it's properly adjusted?