Looks like a good start. There's no such thing as too clean, when it comes to the HV cage.
Take your time and enjoy. My theory with a project like this is that I may never get another chance to do another one of these. It's not a race, I sometimes have to remind myself. It's better to do a job right the first time than to beat some imaginary clock. And while the rest of us may offer advice or cheer from the sidelines, you are the ultimate arbiter of what is "the right way."
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html