Yeah, I've read about the heating pad as well, but I'd have to buy it then... Do you know the temperature of the lowest setting on your pad?
And yes, I need a lot more than just 1L of yogurt, even 3L I've made wasn't enough for me.
Re: the starter, I've come across this post on a yahoo group:
"Elaine (Gotschall) did NOT approve of using yogurt from a previous batch as a starter! To be SCD compliant you MUST use yogurt that is either store bought with none of the SCD illegals in it or the yogourmet starter powder EACH TIME you need to make yogurt." http://health.dir.groups.yahoo.com/group/frequent-dose-chelation/message/22099
But that is too expensive then... :/