The 46AX from tower doesn't have the angled valve; it has a remote valve mounted on a bracket instead of the back plate. Can be rotated 90 degrees. Larger AX's have the angled valve; maybe there's a carb replacement for the 46 if you really want the angled needle. I do think the angled valve makes the most sense, and from my completely inexperienced, yet mechanically amoured background, and would be ideal.