Freon,

Thanks for your considering.

Could you give me more information about who John Breen, "Anindya", "Superpiper" is.

I think 1 or 2mm is negligible at field if adjustable type is available, isn't it? However 1 or 2mm caused by thermal expansion excepting adjustable support shall not be negligible.

Anybody has an idea, please let me know.

Regards,