**broken link removed**
It looks like Heatsink No 4. I found it in the TV my brother had. The screen was about 26 inches wide I would guess.
Yes, MOT Does stand for Microwave Oven Transformer.
Nigel Goodwin, I had it running for about 5 minutes straight, so that may also be the reason.
The IRF540 Limits the amount of power that the FT gets, to around 1 amp I Think? It runs nice and cool also, after fixing a few connections that were stray, and recoiling the Exposed Ferrite Core, I am now getting sparks in 1cm+ Lengths. I believe they are around 10kV? If I had more Amps running through the coil, could I get better sparks?