coolio

Hi,
Wanted to see if I could install this trigger shifter:

http://www.rei.com/product/793371?pr...099-_-10456937

on my bike which has this rear unit:

http://store.icyclesusa.com/sunrace-...ur-p27021.aspx

I googled this sunrace m90 and found this:

http://www.disraeligears.co.uk/Site/...erailleur.html

There is no word on actuation ratio, which I understand has to match up. Anybody ever work on this?