I decided to try a straight shaft mod on the ACE 250. I bought my usual 7/8" anodized aluminum tubing from the local ACE hardware. I had to shave down the lower rod a bit and it really fits snug with no wobble at all. Some people have commented on how cheap the lower shaft is. Let me tell you this thing is tough as nails. I don't know what kind of plastic it is but it defies a sharp file. I have more confidence in it now. The ACE 250 control housing is actually quite heavy for such a small device. I am not sure if this improved the balance at all over the stock shaft but I had to try it. The arm cuff/ rest assembly had to be enlarged a bit to accept the 7/8" shaft. I borrowed part of the S shaft to mount the control housing. This was bonded to a cut down bicycle handle bar accessory which fit the shaft perfectly. For now I have only drilled one hole for the lower rod locking spring. This suites my length requirement. Tell me what you think.