[Tigers] Seat Tracks & Frames

[Joel Martin]

Joe
Your article is excellent - thanks for taking the time to complete.

All
So here is what I have learned, please correct if I do not have something
right.

Seat Tracks
    Alpine Series IV and newer - all tigers, seat tracks
are the same, left and 
right are different.

Seat Back Frames
    Seat back
frames are the same for Series II through Series 5 Alpines or 
Tigers, left
and right are different.

Seat Bottom Frames    
    Early seat frames used a
rubber strap type which hooked directly to the 
frame up to some point in the
MK1A time frame.  My car, B382002193, should use 
the rubber diaphragm, by all
calculations - so I gather that the 'bottom' frame 
is different than the one
that uses the rubber straps
    Crossover point for MK1A & MKII tigers used a
rubber diaphragm type.  So I 
gather these would NOT have holes to fit the
rubber straps?  Does anyone have 
any good pictures, which would show the
differences between rubber strap version 
version later diaphragm type?
Thanks
Joel Martin