[Vertical Distance on a Single Tank of Gas]

No SAS, that'll just slow you down. A small rocket like that is easy enough to control without one.

[Vertical Distance on a Single Tank of Gas]

The best I've been able to do on a single LFT is about 30 km. Were you using stock parts?

Yes. If I knew how to take a video of it, I would.

[Vertical Distance on a Single Tank of Gas]

It's actually not that hard, just leave the thrust in the middle.

[Vertical Distance on a Single Tank of Gas]

52,369m on first attempt.

52,396m on second.

Edit: I got it up to 52,656m, but only if you allow a single decoupler on the bottom to remove the stickiness.

[Three Minute Challenge]

So that 248km was using your design. I tried out my own design and managed to get 254 km.

I think I might even be able to tweak it a bit to get a little more out of it.

Edit: I've managed to take it up from 254.2km to 254.4km.

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Edit2: Well, I just crushed those: 262.5km

[Three Minute Challenge]

248km

Not a very large gain, I realize.