I’m in the Lincolnshire flat lands. This is my second GV and has been the worst one, it seems to consume suspension parts, I’ve done wishbones twice drop links twice and just done the rollbar bushes. Also has gear change issues but I think I’ve got a broken/sloppy rear mount that’s causing that. Just these leaks to sort.if I knew what size the core plug hole was I could tap it out and fit a threaded plug.