Update elasticity and warnings

src/one-body-sample.parset

@@ -15,11 +15,11 @@ useTNNMG = true
 refinements = 3
 
 [body]
-E = 3e3 # WARNING: At 1e5, this becomes tough; at 2e5 we have no convergence
+E = 1e6 # 2e6 is okay; at 5e6 we basically have no convergence
 # "Most steels and rigid polymers when used within their design limits
 # (before yield) exhibit values of about 0.3"
 # -- http://en.wikipedia.org/wiki/Poisson's_ratio
-nu = 0.3 # WARNING: From 0.39 on we have no convergence
+nu = 0.3 # WARNING: At 0.48 we hardly have convergence; at 0.45 it's weird
 
 [solver]
 maxiterations = 1000000