Cam regrinds feasible? (roller regrind)

[goflo at pacbell.net]

An additional consideration with re-grinding cams is the
torsional relaxation caused by removing significant amounts
of metal. This changes the phase relationships between lobes.
I have in my possession a performance regrind TR6 cam which
has a 14 degree phase error between front and rear lobe pair
centers. The grind was done by a national rep grinder (and
purportedly checked with their cam doctor).

This is probably a worst-case deal, as this cam is long and
slender, and has ~.125" additional lift ground-in, but much
smaller phase errors screw things up noticeably. 
This too can be avoided by proper regrinding techniques, but 
once again, by the time you do it right, you coulda bought a 
new one...

I check new ones too :)

Regards, Jack