I'm having problems tweaking my Front Derailleur. I purchased a Mercier Galaxy SC3 online (bikesdirect) and therefore received the bike partly assembled. Having put together a BD bike in the past, this was a piece of cake...until I encountered the shifting with the Front Derailleur. I can't seem to get the front derailleur in just the right position to allow shifting in ALL 24 gears WITHOUT the front derailleur touching the chain. I tried moving the derailleur up and down the tube, tightening/loosening the derailleur but only succeeded in cutting my finger and practically shredding the metal cable. Might the problem be that the derailleur can't accommodate 3 rings in the front and 8 in the back as the range is too large?
Any help or suggestions will be greatly appreciated, thanks!
Derailleurs: Shimano Sora RD3400GS Triple rear, Shimano FD-2303 front