It’s been a while since I’ve played with Windows 10 Deployment…
One of the problems you may come across when upgrading your images to Windows 10 v1709 (fall creators update) is that to capture the gold master image, you’ll need to update your ADK installation.
Download and install the new build from: https://developer.microsoft.com/en-us/windows/hardware/windows-assessment-deployment-kit
Once installed; open the deployment workbench, right click on MDT Deployment Share and select update. This can take some time.
When complete; open Windows Deployment Services; replace the boot image with one you’ve just generated.
Finally, head over to your gold master image; make sure its fully patched (and you’ve performed a disk clean up); and run the litetouch.vbs script (\\deploymentserver\deploymentshare$\scripts\litetouch.vbs).