My dw788 is about 3 months old i had to tighten my lamp and realized the bottom bolt is stripped so i tightened the top extra tight an now my head stays up without my piece of wood i loosened the lamp bolt and it still does it i have been using the saw but am wondering if there is a problem when i lft it it locks into place and there is very little resistance to put it back down right now it works like the delta.