Abstract: An alignment device used to manufacture a plurality of structural insulated panels A base with at least one end post and at least two side posts are provided so that a stack of a structural insulated panels or SIPs can be assembled thereon, cured thereon, and then removed together therefrom as a stack of SIPs. If a plurality of different sized SIPs are to be manufactured thereon, more posts can be provided on the end or side of the device, but they must be spaced so that any SIP will only engage one end post and two side posts. Drop indexers can be used to function as posts if adjacent stacks of SIPs are to be assembled. Index blocks can be used to recess the foam in a SIP.