Had the same turbo on mine and I too blew the seals on a hot day coming back from JapShow. Temps went up real quick but by the it was already too late. I remember a good saying regarding the accuracy and reliability of the temp gauge.
Cold = engine off
Half way = engine running
Hot = engine f*****
Mine got broken into for all the stereo gear which was hitting as designed and installed it all myself and the rx7 boot is not an easy one to fit two subs in!