Hi. I'm looking to buy this product, but the door sits 5mm or so further back than the architrave (but both are flat - see photos). What kinds of shims or spacers can i use to bring the two surfaces level? I would also like the spacer to be hidden by the lock, or be plain white. Ideally it would be multiple slim spacers instead of just one, so i can adjust.
I am planning to put the bolt on the door and the receiver on the architrave, as the architrave is only 30mm wide. (if you don't think this will work, please let me know as well!).
Many thanks in advance for your advice