I have been developing my own black and white film for about a year. In the last 2 months I have been using Agfa APX 400(which I got really cheap in a bulk roll) and HC-110 dil.b which I use as a one shot developer. After some reading I decided to change my agitation technique. Previously I agitated for 10 secs at the start of development, and then 10 secs every minute. I did this for 6 minutes with the above combination and got acceptable results generaly. The last two rolls I have changed my method: the first minute of development I used continuous agitation, the for 5 seconds every thirty keeping the 6 minute development time. These results have been not so good. Should I add a minute to compensate for the first minute of agitation? Or should I just go with what works?