It seems almost every day I see a new fixture or line of fixtures that make use of segmented / notched / serrated knuckle assemblies. Why? I have no idea... my best guess is that these products are being developed without any input from the pro installers who have to deal with them in the field. Bottom line is that these knuckles absolutely stink when it comes time to aim and focus your system. Most of them have rather coarse notches that only allow for about a 10 Degree aim adjustment between the notches. If you need a finer degree of adjustment (and we ALWAYS do) then you are forced to push the fixture over from the ground stake to get the aim angle you need. I would like to see an end to these notched knuckles. There are a few manufacturers who get it: Auroralight, BK, Lumiere, Vision3, HK, Hevilite, CAST (although they have their own issues) to name a few, but most of the mid-line and value line manufacturers use them. Lets take a stand against mediocre products... next time you are speaking with your fav manu... mention that you would like infinitely variable knuckles on all of your bullets, floods, etc.