I brought a glanza 2 weeks ago and the boost kept going all over the place. Thought it was the manual boost controller that was broken. but after looking on here i found the old owner (wont name any names) had the same problem and it was the external wastegate had a torn diaphragm. I want it to run 0.8bar. where can i buy a external wastegate? its for a ct9 turbo if that makes a difference.