Hi,

Then Mr Brenner's contra drive unit is a bargain (compared toa E-Factor unit -I did not imagine other unit had such a high price tag).
Hats of to Mr Brenner for developing this unit and offer it to those that want to use contra rotation props.
Hope there will be no unexpected problems with the unit when there are more hours on them.

I would love to see a video of some of the planes that fly with Mr Brenner's unit - is it a video somehere?

/Bo