Hi, Got some 115mm x 115mm oak posts to make a porch. Need to anchor them onto the top of an 500mm high brick wall. Wall is unfinished - I mean it is not capped with anything - just a raw course of brick and mortar. What do you recommend for fixing the posts into the top of the wall? I do not want any metal to be visible like fence post spikes. I am thinking to use 4 x 12mm galvanised rods set about 6" into the wall with resin and maybe 4" into the bottom of the posts, also bonded with resin. A wooden cill is then to be cut out and fitted around the posts. Sound OK to you?