Best posts made by iDevelo

This stuff will help a lot:

https://www.fasttech.com/products/1040/10023411/5061400-heating-block-nozzle-insulation-cotton-for-3d

Costs next to nothing but will save you all the headaches especially when layer fans turn on.

I'd advise it on a volcano style block.

http://reprap.org/wiki/RepRap_Firmware_macros#System_macros