Happy New Year everyone. Don't know if you've noticed but r-m seem to have 3 new models in their 2012 catalogue. One is a drop bar version with disc brakes called the 'Race Disk'. This has a double chain ring and hence wider gear range looking similar to the 10Y Birdy. The other two 'World Birdy - sport & comfort' have a new frame reminiscent of the classic shape but with internal cable routing and a non circular section straight top tube. Does anyone have any info/opinion about this new frame? Lighter or heavier - stiffer or weaker? I'll try to paste a picture again . .