Hey team

I am building a BEC , using a small classic car chassis and body and are currently researching a reverse option.

So far , I have found many options but the latest bit of kit is a EXT-RGB1 from
http://www.extremeengines.com/cgi-bin/trolleyed_public.cgi?action=showprod_EXTRGB1

Seems strong , well built and well priced ( about £830 landed to me here in Oz)

Just wondering if anyone has any experience with this "rotation flip" style geared
down box ?

Or - any other alternatives apart from quaife or other super exxy bits ?

Thanks again Ben