The intercom is easy, you can buy a kit or the separate parts on eBay and it’s just a case of plugging it in. You don’t need the air pipes, this is for the NBC system which you’ll never use. I’ve made the cable for the night sight box before, again Bowden cable parts are available on eBay. Post a photo of the issue with the drivers hatch and I’ll see if I can point you in the right direction with that too.