Just to elaborate a little more:
1. Pure Ethyl Ether versus Naptha -
For doing a seed extraction, Naptha will work, but for doing extractions with the rest of the synthesis, can you use it also? Is there other materials in the Naptha that will cause issues?
Naptha is nice because the ignition is higher then Pure Ethyl Ether. Don't want to use Ethyl Ether unless it is required.
2. Diethylamine -
Since it is not pure DEA and may contain a small amount of water, will this cause an issue at this stage of the synthesis? Should time be spent removing the water from the DEA?