I have seen two schools of thought on pillar bedding techniques. One, the action and the btm metal only touch the pillars, with a non load bearing bed around the action. The other, the action is on the pillars with the non load bearing bed around it, and the btm metal is up tight into the stock. Is there any significant difference, accuracy potential wise? Also, with an aluminum bed block style stock, it would seem that the btm metal would have to be tight up into the cut out. Do you really need to care about the btm metal?