Scratch built rocks offer limitless designs or as limitless as your imagination, these can be challenging and fun to build, there are a number of designs available off the internet for those who don't want to design their own. For those who want to design their own I would suggest getting Rocksim as this will prove your design is stable before you spend any money to buy the parts to build the rocket.

Here are some designs that I have made.

Mako Shark by Roy Trzeciak-Hicks

1/4 Scale V2 (V0.5)k by Roy Trzeciak-Hicks

Versitile Launch Platform (VLP) by Roy Trzeciak-Hicks

1/4 Scale V2 (V2 Take2) by Roy Trzeciak-Hicks