I have just completed my Puffer and am quite pleased with the outcome. The components are quite good but do need a bit of fettling but this is what our hobby is about. This is my third Caldercraft build so I am used to their quality and sparse instructions.   As usual for Caldercraft you need to have your thinking cap on as the A0 plan and the 'instruction book' do not match up but of course they do expect you to have a little bit of experience in model building. it has taken me about 6 months to build working on and off over this time. it has a large hull which is easy to house the motor, ESC, RC and batteries, etc. (I installed 2 lead acid 6 volt batteries, one on each side amidships) which gives stability and ballast. Being a large deep hull it needs a lot of ballast, even in its short length.I have only tested her in the big white nautical test facility at home so do not know how it will perform on our lake but hope to try it out on Sunday if the weather is set fair. Tried her out Wednesday and she sailed really well - maybe a little more ballast in the bow but not too concerned.