Thanks for the response.
I'm gonna try my Subaru supplied tool.
A few other pointers;
1. Warm motor before unscrewing plugs, the heat expands the alloy head so the threads won't gall.
2. I always use anti-sieze on the sparkplug threads for reinstall. Locktite now offers anti-sieze in a glue stick typr push up sleeve - less messy.
Mark