Need to upgrade but don't have big bucks to spend. Looking at used bikes and have seen a Colnago Technos 2000 model with steel forks for AUD700. Has 105 groupset with very sticky gears (so sticky when I rode it would not change down, so I went home!). Frame in good nick, right size. Has corrosion on shifters. Probably will need some group set upgrade. Anybody experienced with this bike and advice for a less experienced rider?