Hello,
(sorry for my English, I use Google translator)
I have experienced this problem.
The grating is forced due to the expansion of the support.
It occurs when cold.
1 / If the grating is glued to its support, Shelyak contact that knows the problem.
For me, Shelyak changed grating and its support.
Malge exchange grating and support, I had a small problem
2 / if your grating is held by both sides as here
http://www.astrosurf.com/thizy/lhires3/ ... uille1.jpgI removed the two holding pieces of the grating.
Scotch double-sided: grating - support
I handed the two parts but are no longer in contact with the grating.
It's just for safety.
Franck
(la traduction semble mauvaise, si une bonne âme passe par ici. Le problème vient d'une contrainte du réseau par son support. Ceci est dû à la dilatation des matériaux.
J'ai galéré pendant presque deux ans avec ce problème)