[oses]

> belly-flop landing ...

Seems less likely that SN6 will be used for 20km flight + belly flop due to the change from 301 to 304L. If I had to guess, I'd say it's likely SN6 will be used w/ nose-cone and LOX header tank for additional short duration hops.

[johnmcd3]

I believe Elon said they were targeting SN8 for a high altitude flight with 3 raptor engines, hopefully later this year. Various parts are already under construction.