Hi Magnus, just read through your blog... I know you probably have your bike setup as you like, but I noticed that you questioned whether a dual drive could be fitted with STI levers.. did some ebay shopping awhile back and installed a set of Midge drop bars and SORA STI's on my SpeedPro and used a 105 Short Cage derailleur.. it works perfect.. the left lever is for a triple and the right an 8spd..

Have Fun,
Bruce