Hi,
While Mickey was developing his gyros, I build a Wallis gyro which has the swashplate and pre-rotator and this was developed by Col. Ken Wallis back in the 70's. This is about a 10 lb. model and certainly needed the pre-rotator.
Also, did anybody see the Whopper Robbe Schluter that just sold on E-Bay for $430 with shipping? I wonder if it was anybody in this group that bought it.
Anyhow, it's a large tractor type, with swashplate and pre-rotator. I would guess about the same size as the Wallis.
This is the link to the E-Bay page if you are interested in seeing the pictures.
http://cgi.ebay.com/WHOPPER-ROBBE-SC...QQcmdZViewItem
Phil