Thanks for the feedback. I just use #8 x 1 1/4″ or 1 1/2″ screws for the backs. Per AWI specifications, you need to make sure you’re no greater than 4″ on center. However, I usually only do that on upper cabinets because they are hanging by the backs. On lowers, I typically do around 6″ O.C. these days.
I don’t have many more videos specifically targeted towards my construction method for kitchen cabinets; I have a lot of other internal ones that I use for the school, but most of those wouldn’t be as relevant. It’s on my to do list to do a series of videos explaining our construction method. When I do I’ll post them, but it may not be until summer.
Sorry! However, if you have other questions please post them and I’ll do my best to answer.