This is quoting the original owner, I just bought the gun with woods and replaced with syns.
"I went to A place called Fieldsport in Traverse City, Mi a number of years ago to have some guns fitted by a fellow named Brian Bilinsky. I took the SBE just for fun. On the SBE, the gunsmith glass bedded the head of the stock because I need to use a higher shim than normal so he wanted to give the head some additional strength. You still use the shims. The head was just strengthened. There was nothing wrong with it; the work was just preventative. Hope this helps."