I'm going to try LTSpice

Looks really handy. I had heard of it before , but you are the first I know of to try it.

Heres an example.

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Finally decided to take the plunge after watching a YouTube video.
Looks easy enough.

The demonstration was pretty good.
I had to run it a few times to pick out stuff that was mentioned too fast for me to catch.

I tried His example and after a few trial and errors on my part it worked great.
Its free and has a beginners manual you can also download.

Now I will delve into seeing if I can download tube symbols (I guess Duncan Tubes has some spice models) with built in parameters or at least that what I gather.

It will allow you to use it Just like a Scope (graphics) you also can get current and voltages. All you do is insert symbols and link connections then do a simulation. It even has a probe that appears so you can test certain test points. I am amazed.