Report Core Sound 17 & 20 mk3 building from plans (no kit) among other questions in B & B Yachts Forum Posted Monday at 08:54 PM 6 hours ago, Chick Ludwig said: You are NOT wasting your time. You are an engineer and do the BEST way. I'm an ADD kid and do the EASIEST way. But it works! Engineers are practical folk. If it works and is faster/easier/cheaper, then it is the better way.