Thanks for the offer! I had considered making some shims from copper pipe, as the new aero bars I have are sized for larger bars but are missing the shims for smaller bars (got the bars cheap at my LBS that has excellent deals on stuff like that). But first, I need to find the proper flat bar; I need either, a wider center section 25mm without taper, or a more rapid taper/step down to 22mm, and then buy the dogbones accordingly, to raise up the aero bars alone. Actually, before that, I should buy a new handlepost; I love the tapered steel old Dahon one I have, perfect height (for the flat bars) and more durable and no squeaks like the adjustable height ones, but, the handlebar clamp does not "open up", it's like an old road stem, so need to take half the parts off the bar to slide the handlebar out; I want the new style clamshell opening top clamp, in order to be able to quickly and easily separate the handlepost and bars, if needed for travel packing. I'd prefer a one-piece handlepost, which they do make, but as tall as my current post, that may be more difficult. THEN, a flat bar as noted to match the post clamp size, and then dogbone clamps to match the bar (these would grab the flat bar at wide points, as the aero bars clamp very close to the handlepost, so can't put the dogbone clamps there), then a short piece of handlebar clamped in the other end of the dogbones, and the aero bars clamp to that inboard of the dogbones, with shims if needed to attach the new aero bar. These little mods can be surprisingly complex. Fitting the 2X crank and FD to mine was tricky, had to do some custom fitting, but well worth the effort. Raising the aero bars will be worth it, so I can spend more time there, taking the pressure off my hands, but still have the flat bar lower for good standing climbing.