I think your plan is a good one. Something NEW to think about. WORMS will naturally clean out your pit. Read about my worm research at the bottom of my report, dated 5/26/14. http://tinyurl.com/Septic-Solutions
Some species of Worms will thrive in aerated water.
Now that I have my drainfield running perfectly, I'm going to flush 2,000 worms into my drain field to keep it running perfectly.