wow, that is looking good. The only thing you may want to check is the AGC setting and confirm if the contrast control is working well. the AGC will help with contrast some. If the contrast control does little then its prob that cap I mentioned, but frankly it looks fine to me as is.
Kinda too easy eh
Oh and for fun when you get the HV probe double check the voltage, but I think you will find it all works just fine as is.