Regarding motorcycle liners, there was the big attempt a few years back to up tubing size. It would have essentially scrapheaped quite a few of them.
I don't know what the rules folks are thinking right now, but if I were contemplating a bike liner, I'd certainly be looking for an approach that would be able to circumvent any potential disqualification.
So I'd have to add in the cost of a crystal ball - clearly less opaque than the rules committee.
To Tom -
I'm sorry if we came across as harsh, but look at what's happened because you suggested an out-of-the-box idea!
This has turned into a really good discussion, and we'd certainly like to hear your thoughts.
These threads don't always work as the original poster intends, but very good thoughts and information are coming out of it, and we have you to thank for that.
I think you should sign back on.
Chris