This thread is also trigering me a bit, but I prefered to not reply about that.
About the rocket Lemni is right, there are a lot of perfomances that you can do to this rocket and this is not world record (even that it's non-dlc) and for this to possibly be a world record I think the mass of the whole rocket would be lower than 60 Tons (or less than 20 Tons), also the videos and records of this forum doesn't include at least "half" of tries to have world record in the internet (or more concretely on youtube), but in my opinion it's still a good mission/try.