@Swislon, I found your thread with your CT4. Interesting to compare the bar position with mine. With the brakes in the most usable position, the ends of the bars come back past the head-tube. If I had bar-end shifters, then I'd be banging my knees into them while riding. The solution is to rotate the bars, but that will put the brake levers/hoods into an unusable position (necessitating tape removal and resetting the lever position). It would be prudent to actually replace the rattly brake levers at this point too, which would mean new brake cables as well. An annoyingly simple 'fix', for about £50 and an hour or so of time.
How do you find the fork, on not-quite-smooth downhills? I might swap out the front tyre (possibly just put the front wheel from my LHT in) and go back and test riding down the hill where I experienced the wierd bouncing feeling.
@jags, I think the 9-speed Dura Ace downtube shifters have a friction mode, whereas the 10-speed ones don't. I agree that STIs are better than downtube index shifting, but I don't think they are better than downtube friction shifting; for smoothness.
cheers,