This is a welcome release. The thrust is a bit higher but overall this is still a "soft" motor. The three cluster propellant mass is 107.7g which is well under either the older 113g limit or the newer 125g limit. Its 35.9g propellant mass is over the mailability limit. I would like to see Estes and NAR petitition the USPS to increase the mailability limit to 125g based on decades of hassle free mailing including times when they did allow such mailings. It would bring the USPS in line with FAA, another federal entity. Treaty changes to allow mailing to/from the USA and G20 countries would be helpful as well.

I look forward to a high thrust D with the new Estes igniters.

I urge users to give Estes feedback on reliability under different storage and launch site environments as soon as possible. You might recall, if you are old like me, the Mighty D started life as a D13 and was downrated to a D12 after field failures. The E9 started life as an E15 and was similarly downrated. This E12 seems like a middle ground compromise between these two designs.

Jerry