Hi Just practicing building a roughly 3x2 metre shed using cavity wall construction, I'll be using practice mortar once I've figured out the bond so it's not a permanent structure. I'm finding it really difficult to dry bond out the inner leaf block work with outer leaf brick work such that the the ends are flush allowing a cavity closure to sit on the end and then the door frame. Any ideas where I'm going wrong with the dry bonding no matter what I try it seems to just be out by a wee bit. The cavity space is 100mm and I'm alternating 100mm blocks on the block corners. Any advice about how to go about doing this correctly is much appreciated.