seat springs

["Mark Gendron" <mgendron@speakeasy.org>]

I need to build some TR2 seats, and I have a couple of questions about
springs:

1. What's the difference between the early and late-style spring cases?
Will early seats look right if late spring cases are used, or is the shape
significantly different?

2. Does anyone here have experience with the replacement spring
cases sold by TRF or Moss? I've heard they're too stiff.

Thanks
-Mark Gendron
1954 TR2 #TS2571L