Ahh TSR...was looking at their website this morning. why must everything be in QLD lol. Cheers SD. This one is in Melb http://www.advancedjapautoimports.com.au/suspensions_coilovers.html as well as a couple of others in the west side. --> Just got off the phone with these guys, they don't do rebuilds =( Still waiting for callback from TSR. Received callback from Chaser Motorworks and they referred me to their contact whom they get their suspension work done there. http://www.centrelinesuspension.com.au/ Hopefully, these guys will be familiar with Cusco zero series as they live about 15 mins drive from my house too. --> Just spoke to Chris and he suspects the noise may be due to a worn rubber seat and the spring may have gone through the seat itself knocking on the pillow ball mount. He also mentioned the noise may be coming from the front strut or even worn bushes from experience. Only problem is that, he wouldn’t be able to get Cusco parts and doesn't have the tools to re-gas/oil the coil itself back together. They specialise in Koni, Pedders and Bilstein suspension. I will book my car in on my next rdo to get the noise problem diagnosed. Worse case scenario is, if they can't get replacement parts and fix it, I will need to ship the front left coil to TSR, if they are able to rebuild it.