New to biking and have found this forum very helpful. Now my question. I purchased a used bike, full shimano 105, triple, 9-speed, only to find out the left shifter was pretty much shot. Tried all the lube techniques but decided I need to replace. Money is tight at the moment so I only want to replace the left shifter to get the bike functioning better. I have watched ebay and am amazed what some of the older, used, 105's and ultegra shifters go for (almost the cost of new). I found a Dura-Ace 7800 left shifter (new) at a price under $100.00, however, it is for a 10-speed, triple (vs. my 9-speed triple). Since I am only shifting the front derailleur, do the number of speeds matter? Will I be able to get away with the DA 10 speed front shifter with my 9-speed FD?