A scratch built rc boat hull easy and inexpensive. learn to scratch build with this simple project. plans are available for download.. Super and cheaper rc hobby online store in sydney hails to be the best online shopping store in australia. the company is also hobby enthusiast’s no 1 choice and is. Step-by-step. my boat build resembling the amazing curves of the riva range. all plans were self thought of from my imagination, self draw and self cut.