Diggit Drupalextras

I added the latest ckeditor. But I cannot alter the toolbar at all. The config.js is basically empty although most tutorials refer to text within it. It seems like all the default info is now in the compressed ckeditor.js. I have tried altering (even just removing e.g. 'Italics' from the list that I could find in that file. no change. I have added custom toolbar configs to config.js and they (hooray) do show up in the list of editor toolbar options under site config > ckeditor. but if i choose it... then the whole editor disappears. Ugh.
I have read a lot of postings etc. and have tried lots of things. Can you help?
My original goal was to load mediaembed onto the toolbar. I have followed the instructions as best I can (given the fact that the config.js isn't the same any more.