LOL! I've had OSD or OCD for awhile myself!
I've been looking around trying to see if anyone can offer a good way to save multiple brassica seeds but didn't find a simple solution. I guess you could save seeds of ONE variety and not let the others bloom, or if there was a way to ensure the different varieties would flower at different times, that would be nice! But, since they are insect pollinated, isolation is more difficult and too much work!
Here's some seed saving info I thought has some good info:
http://www.realseeds.co.uk/see...