Found info from update 1.6.1.9.1 of gruntmods edition that "Temporarily removed the build queues patch by MVI, it will be added back in a future release", so probably in previous versions (1.6.9.1 or 1.6.1.8 and below) this function is been? Maybe someone have gruntmods edition installers of 1.6.1.9 or 1.6.1.8 versions. Links in gruntmods.com site for this updates are dead