@LarryW 
Just a few questions. To clarify, you start germination around the first of March and plant permanently in mid-April. So you have about a 6-8 week turn around from seed to planted seedling? How big are your seedlings generally when you plant them in the beds? Do you continue to fertilize them once they are in the beds?
When your seeds are germinating in the H2O2, do you wait for a certain length of rootlet or for a green shoot to begin before you take them out for planting in the cells? The Rootrainer system you use, is it all inclusive or do you also have to purchase a soilless mix to go in the cells? The product website says the Rootrainers are reusable...have you found that to be the case? Do you bottom water or top water when the seeds are in the cells?
Also, if you plant them in the cells as they germinate, then seeds of the same cross won't always end up next to each other in the cells but you make sure they are grouped together when you plant them in the beds?
*Edited to add another question
