Well I just received an amplifier kit, came with just a circuit diagram and a note to say that layout was up to the builder. I have designed a layout but as you can see the build did not progress very well. I must remember to place plain washers underneath the shake proof ones when using ceramic bases. Never used these before and did not see the problem coming, thankfully they are easy to obtain but yes, you always seem to be on a never ending learning curve with home construction