Fair enough, I guess if MR2QIK hasn't had any dramas then I'll just stick with my OEM one. I have also been browsing the forums on mr2.com and they also reckon that OEM diff can handle a fair amount of power.
However I think because the diff and gearbox is so close to the cabin in the MR2, the noise and the feel of a mechanical LSD can be offputting for many people - I had a drive and a ride in a 300 kw S14 with a Kaaz LSD and it felt quite nice, no 'crunching' or major whining with the added traction in a straight line, not so much around corners.
In other news, just bought a sidemount intercooler kit and 4" intake - just need a down pipe then I'll up the boost from 13 psi, just to get a bit more extra power.
I'll post pictures up when they get here.