the method above solved the over heating problem easy and some people who have brought the Gibbs hdr have also experienced over heating problems with the electromagnet, as for the metal switches no good they have an outer metal body and if a wire strand should stick out and touch the body it be no good even if the wire comes off and touches the metal switch body then you'll have a dangerous situation, ? i used plastic 240- 250 v ac switches and the soldered wires to them are - heat shrink tubing covered where they are soldered so no danger there the plastic switches are electrically insulated and dont conduct dangerous voltage through the outside of its body, only its inside contacts conduct , for the electromagnet i used hi temperature polyimide Kapton tape a few layer's between each coil layer and at the end its taped over by high temperature stretchable silicon tape that molds into itself . the polyimide Kapton tape is used for winding transformers motors etc etc and when you put a few layers over the coil the next coil layer will wind evenly on top and not sink in leaving the wire coil layers uneven, to see how i wind then b y hand i used the easy method of rolling the wire on and guiding the wire in with my hands and fingers see my videos how i did it . on my youtube channel
