The transformers are MOSFETs (http://en.wikipedia.org/wiki/MOSFET) that switch the power to the motors. Depending on how the pigtail wires are soldered on to the pads next to the MOSFETs they will displace the heatsinks laterally. It would be best if you could get the heatsinks to sit squarely on top of the MOSFETs for better cooling. You might have to just re-flow the solder and move the pigtail wires slighty to do that. Andy
Guys I did see e drop in temperature once I install top and bottom heat sinks I glue them with small drops of the Artic Silver once it drys it is very strong also another thing that helps is a very light cover shade over the Bl ring and FC I think it helps the difference in temp between direct sun and shade is substantial you feel it on your skin. http://forum.freeflysystems.com/index.php?threads/heat-protection.322/page-2#post-20223 #28