Just a personal comment. If you have been using the FAS-DPD (which is what you have with the 2006) and have gotten used to the accuracy, you will be disappointed in the OTO test. The shades of yellow are very similar and I find it highly subjective. I can certainly tell that I have chlorine present, and maybe that it is 2 or above, but I really can't discern much between 2, 3, and 5 (or above 5). The choices are either .5, 1, 2, 3, or 5. It takes me longer with this test because I can't make up my mind on which yellow it matches so I spend several moments spinning around to change the sun or what is in the background.
I use it occasionally now when I want to just stick the kit on the ladder, float around a bit and then check only the chlorine and pH. if it fell off the ladder and got damaged, I wouldn't care. pH part of it is the only thing worth anything to me.
In my opinion, it won't save you any time. Save you money and buy a refill of the powder and first reagent used in the FAS-DPD test. That is what I wish I had done.