Vermil

Actually, it concluded on page 982, it picked up at 981.

...From 943, where I left it. This is the third Laythe mission, starring Tandan, Sigrid & Bilfal, and the Kronos_C_MkII.

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I think it is really hard to achieve what you did from stock parts  Look at me, using mods still can't achieve anything  

It was ridiculously hard. At times I almost gave up. As I said, it's not the right way to do it, but at that time I imagined that rendezvous and docking would be harder. People have done even harder things though, like Eve. I'm still tinkering with that.

Also, Kronos has a long pre-history as well as pre-story. Note that the first mission rocket was Kronos_A aka Kronos_X14. That means thirteen previous versions. The Kronos_X13 did the trip unmanned, the dress-rehearsal so to speak. But even before the Kronos rockets there were the Banshees.

Similar concept and somewhat similar. They relied heavily on atmosphere braking on Jool though.

Two unmanned Banshee experimentals attempted dress-rehearsal on Laythe. The first one failed to achieve orbit again on re-launch from Laythe. The other, much improved, made the whole round trip. But before I could do a manned mission with Banshee, KSP v1 was deployed. And with it came a re-entry heat model. It was no longer possible to aero-brake on Jool. And even milder aero-braking required heat shields. And it required more fuel. So I started from scratch again with Kronos. I probably wouldn't have persevered as stubbornly, if I hadn't already made it with the Banshees. I kept thinking that if I only could provide heat shields and stability for aero-braking and also somehow improve the fuel budget somewhat, then I'd be in business.

And, well, that's how it played out.

My main point, which I think you should take with you, is that I didn't just bolt together Kronos. I worked out solutions to issues, solved problems. Again, again and again. I'm still at it. I have small things to fix, resulting in a Kronos_D (Kronos_X18). I don't know that it'll ever fly though. I think I'm going to consider Eve for a while.