Steel plate need to be Blanchard ground?
If I were to get a 3/4" steel plate in either 24"x36" or 36"x48", does it need to be Blanchard ground to be used as a surface plate?
The yard rep had mentioned that their plates are .030 across that span. Since I know nothing about this, I'm looking for the experts advice.
Update: There is a shop in town that can Blanchard grind it for about $500. However he can only go up to 36". He told me it would be about .003.
Will a 24x36 surface plate be large enough for a BB post and head tube centers?
Thanks a lot.
Brandon