New to brewing (since 12.2012) but have done 14 batches already - 8 * 4L batches the rest 20l batches.

I am using the single vessel process and have devised something of an insulation process for my 40l pot. My blanket is made out of hot water heater blanket (fiberglass with a durable backing) doubled it over closed it up with what else .... drum roll... duck tape! I made both a lid and a wrap that I pull around the pot once I have the water and grain where I want them. This lasts about 20-30 minutes in the early spring weather. when colder more like 15 minutes.
Does any one have interesting\better ideas on to how do insult the pot during mash process?
drummorc
Delaware USA