Here's the Small Parts motor mount extension I got for the Bixler 2. It's rated for up to 9 inch prop, but following Andreas' lead I trimmed a notch in the Bixler tail and fit a 10 x 4.7. It draws 30 amps off a 3S battery.
HK now has a similar mount... no idea how it works, but it's certainly a bit cheaper.
