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Originally Posted by vintagespeedwerks
contactors seem to be 25.00 at mcmaster carr, but who knows what ones are good and are not etc
i dont think anyone is keeping secrets on purpose, but ive looked through every post on here for the 11 pages and not a whole lot of solid answers there. seems everyone asks questions or posts stats about their oven and says they will reply with the rest of the info/details, but never does 
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most any part you can buy from mc master will be a good part. they got thier reputation as an industrial supplier by selling good quality parts. as for exact speck on ovens, not to over state it but when you or someone else is homebuilding the "exact specs" can be a fly by the seat of your pants thing. most just find bits and pieces from others and then try a few different combinations and then it works and they dont think much more about it. i for one will be happy to help out as much as possible but keep in mind that any advice i or others give is a use at your own risk kind of thing since most of us are not master electricians or thermal engineers. the best approach is to decide how big you want the oven first and then we can help with the heat load first and see if you have the power needed to run it. then the design part comes in to the picture. what kind of a budget will dictate how it turns out. hope this helps some and dont hesitate to ask away bro and we will help as much as possible.