Did a Rifle Company Butterworth tour in '89-'90 (plaque should still be there in the Hong Kong Bar - although I had heard that it had burned down?). Still an Aussie det at RMAF Butterworth - plus a rotating company that was ostensibly for base defence (although ours was designated the last 'operational' tour) - but more now for inter FPDA exercises etc.
Brilliant place to be - outside the airconditioned comfort your pores will get a 24/7 workout pumping litres of sweat - food brilliant, people great also.