After speaking to a German at a dynamo manufacturing company it appears the Forumslader is the #1 unit to beat. I like a challenge.

England -v- Germany

Match accepted!

Can somebody contact the developer of the Forumslader and ask them if they'd be willing to provide a sample (without batteries) and I'll do the same. We can swap back afterwards if it is desired. I'll be testing the Forumslader under lab conditions, 6V AC @ 250Hz, 10ohm (0.5A) load as per the detailed spreadsheet posted earlier. Hopefully they can add the D1 to the speed test.