System advice. Which do you use?

[alexei]

I use Twilight:2013 with Stage III rules. I like the flow of advanced combat timing.

I like the original v1 timeline and skill improvement rules. I like the encounter rules from v2.

I ran a campaign using the v1 timeline with Tw2013 rules a few years ago, and it worked quite well, but there was very little vehicle combat in that one.