So I've decided that the cost difference between the at-home Kodak E-6 kit and $12/roll professional development is too great to ignore. I am competent in chemistry and have no fear of precise measurements, preventing spills, etc. I want these slides to look great but I also accept responsibility for my results. I've built a water bath to hold the chemicals at precise temperature. Since E-6 prefers continuous agitation and because manual agitation is mind numbingly dull, I'd like to use a rotary processor. I have a Beseler Motor Base. I understand that temperature control + time define the exposure for the first developer. I have built a two layer (12 mil thick) neoprene coozy for my steel development tank that encompasses top, side, and bottom. In my testing, I preheat both the tank and the neoprene in the water bath. I then pour in '1st Developer', i.e. water which is at 101.0 F. It takes 25 seconds to pour in the 350ml of solution (a 2 x 120 reel tank). I place the coozy on the motor base and measure the temperature at 6 minutes. It has dropped 3.0 F. This is consistent every time. I am thinking that the temperature drop is not a problem. I just need to adjust the 6 minutes somehow to compensate for the drop off. Consistency is most important and it seems I've achieved that. How would you adjust the first developer time? Is testing the only option? Also, if it takes 25 seconds to pour in the chemistry and 15 seconds to empty, how would you adjust the development time? I try to keep the tank parallel to the ground while I am pouring so that the solution is evenly spread along the tank side during the 25 seconds. This is correct? Thanks for all your tips. I plan to run a test roll tonight.