I added the additional selection for front / rear axles. Thanks for the suggestion.
The parts list is a hard thing to maintain as like you say, sources change frequently, especially when they are ebay or aliexpress. This is definitely something that needs to be improved. The current list is updatable, but only for those who have the necessary permissions. The closest thing to a list that anyone can update is something like a forum thread or Google spreadsheet. I'll have a bit of a ponder on how we might be able to achieve that. Ultimately it might be a goal to have parts sources listed within the Groups as that way they might be more relevant. Once of the best lists I've seen is the one that
Steve Vinson has on Amazon Perhaps an approach like this would be better. The parts listed are not the cheapest, but appear to be always available. It then gives First timers a starting point from which they can then go and seek out cheaper alternatives if they so desire.
Other things to help first timers... I plan to add a bunch of additional technical articles to help first time builders. It would be good to get the resources section stacked with little articles on every aspect of the build, but that is an enormous endeavour and something that I would love some help with. If you are willing to share the metric versions of the plans I'd be happy to update the current article. As for other articles, I did stick up a post asking what people want to see but so far there's no response. Unfortunately the forums move a little slower now that Social Media has taken over.
Some additional help with the website and Facebook page would go a long way towards keeping things fresh and updated, both for things like the parts list but also other content too. At the moment there's only me and I'm juggling a bunch of similar web projects alongside my full time business whilst in the middle of a self build. Reality is that I'm spread far too thin. Just need a willing volunteer or two. There's no pay, but training can be provided