As mentioned, if you want to try JFT foams, the best thing to do is to glue some donuts on to Contact rims for a tester. I've known a few top drivers to try both set-ups of tyres and there's not a lot in it... if anything really. But always worth a try!
Axles can bend, it's not an uncommon thing to happen if you have some heavier or awkward impacts. If you remove the axle it should be pretty clear if it's bent by rolling it on some glass.
The end stub-axle can also bend.
Just messaged Jimmy to see if we can get a GT12 section by the way