the diff should feel really free when you spin the outdrives!
its not really a limited slip diff as such but more of a Powerlock diff[X(]
off power the diff will be really free giving you excellent turn in, but under power as long as there's some grip at both wheels the diff effectively locks up enabling you to lay down maximum power, but as soon as traction is lost at one wheel the diff will diff out really quickly until that wheel touches down again & then locks back up powering both wheels evenly!
the main advantage of these is that you never have to change to a different weight silicone as the diff is self adjusting to the amount of grip available, plus the steel gears never seem to show any signs of wear
some people think the diffs action is a bit too ON/OFF for them & a standard diff gives a more consistant though slower steering feel!
the choice is yours, but i like having the steering that they give