Friction shift the FD and it should go simpler .. at least Indexed Rear 9 speed road and MTB were compatible .
I havent kept up with the uprgrade-itis Joneses ..


You do realize you are not the first person to think of this ?,

You Could google (or any other search browser) the phrase,

and the past times this was asked on this very Forum will come Up ..

https://www.google.com/search?q=Swit...hrome&ie=UTF-8