winding own transformer

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Original poster: "colin.heath4 by way of Terry Fritz <twftesla-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>

hi all
        im concidering winding my own transformer using one of my industrial
mot cores possibly winding two to series for high enough voltage
i was thinking of making them 5kv each then submersing them in oil
does anyone see any immediate probs with this?
i know this is hard without actual specs i will make some measurements and
calcs if its feasable
many thanks
colin heath