How big a job is it to replace seat foam?

["Radley, Jack" <JackR@SHRIVERCO.COM>]

My 76 TR6 seats are continually dropping crumbs of seat foam.  In
addition, the seats are a little saggy.  I have purchased new seat
diaphragms but have not yet installed them.  Considering the
disintegrating foam and the crumb issue, would I be better off to do the
seat foams at the same time I go in for the diaphragms?

How big a job is it?  At times I can be a real hack.  Should I buy the
foam kits and have it done by a pro or is this something that not even I
could screw up?

Jack Radley
76TR6