Okay everyone, first - if you want more information please email me here janddgeekie@gmail.com
The rocket can be easily extended in height by printing more plans out and then using the existing reducing sections in reverse - will post some pics soon.
all 4 pages of plans can be downloaded from the following
See my website for plans which you can download and scale up or down. Care needed when fixing cylindrical sections so that they are vertical. I suggest cellophane tape which has been cut into thin 5mm strips and then fixed to the sections being assembled. Good luck.