Hi I have been running a mbc on my glanza which was set at 1.4 bar on tdo4 with external wastegate, any way today I have installed a greddy profec b spec 2 ebc my question is do you need to use both ports on the external wastegate I have plummed COM to lower niple on wastegate and NC to the turbo compressor niple If anyone is running an external wastegate with an ebc any help will be appreciated, thank's Danny