Take care in your wishes. Traditional diameters and very thin walls make for a very flexible flayer. Great for climbing in a low effort and floating over ripples. but not so much for jamming and aggressive motions. Ishiwata (Kaisei) holds a special place in my riding. I built a frame from it's 022 set back in the late 1970s. While it served me well I "moved on" to lighter stuff. Ending up with Columbus KL (.5/.7). A great century bike in the classic sense but like Andy Hampsten said, the only thing worse the climbing with an ultra light bike was descending with one. (This is not an exact quote but the jist of it).

When all we knew was traditional diameter tubing we overlooked the ride quality shortcomings of these bikes. But these days we're smarter and have better options. For only a few onces more you can have a more solid frame. Really consider a step oversize diameters as the least. Andy.