installing a moonroof
 

just wondering has anyone bought the base model and installed an aftermarket moonroof? is it a good idea? how much did it cost and are there troubles as with leaking?? thx

It would be difficult, as the roof is not flat, it curves inwards. The OEM moonroof actually matches the curves.

This isn't the best picture to show the curve, but you can almost make it out:

I wouldnt do it.

Mazda Australia don't offer the roof at all on any of the 8s.
I've consulted some aftermarket installers here in Australia who strongly advise against it unless you're able to obtain the OEM unit from Mazda Japan.

careful watch out for leaks!