Digital Draftsman - thanks very useful. So, one I understand on routes. although that does open a question about locos and other third party content - sound & enhancement packs etc. But (and bear with me on this) I didn't suggest third parties could produce content without some form of TSW editor - as I stated 'couldn't they use..the same tools as DTG - ergo they wouldn't need the 'add-on' editor.' DTG is a publisher - it's in their interests to have third parties involved as they produce content that then produces revenue for DTG by way of distribution. Why, providing you have some sort of contractual arrangement, wouldn't the third parties just have access to the same tools as DTG? I guess there might be some issue about them changing core cooked data, but there would surely be some ways of policing that? If you'd gone that route, rather than waiting for the 'add on' editor we might be already seeing third party content? Many of the third party publishers have made a business out of producing better content than DTG - and in fairness often more expensive content. I presume they can still do that, but I do wonder if the 'user' editor might have enough constraints and omissions (perhaps invisible to the ordinary non commercial user) to make that more difficult for them?