I just got done building on a frame using some older parts, about 1999 Shimano RSX triple STI brifters, triple front derailleur and triple crank. Here's the problem. I am able to shift higher from smallest to middle to largest ring just fine but when I'm in the largest chainring and I click once to go back down to my middle ring, it won't stop at the middle chain ring but it always takes me all the way down into the smallest chainring. I've played with the cable tension but can't seem to get it right. Suggestions anyone other than to part with some cash and buy different brifter and/or front derailleur?