The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details:
https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is $300 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
2) If you purchased it in Canada, the pivot was probably tight enough that flicking it open was impossible out of the box. But if you loosen the screw or it wears it might fall under point 1. But at that point you can at least argue wear and not modification. So you're still okay, possession-wise
The Clean Air Act of 1998 clearly bans the "open flame of fossil fuels", sorry, the Zippo is illegal to carry in Canada. Just keep it concealed, don't pull it out in public, you will probably be ok.
No. The law makes no such distinction. If the knife opens by centrifugal force it is prohibited, regardless of whether this is the result of modification or wear.
That the knife has loosened over time due to wear is not a defence. The intent element of possessing a prohibited weapon revolves around possession, not around the rules of what is prohibited. The essential element of prohibition is knowledge of the nature of the thing possessed. If you are aware the knife opens by centrifugal force, the intent is proven. You can of course claim you didn't know it could be opened that way, but that isn't going to wash if it flicks open easily ... the court is not dumb and it isn't obliged to take your word for it.
In short, any knife that flicks open by centrifugal force is prohibited, and if it flicks open easily you are essentially without a defence.