I've got 125mm grinder & also 230mm grinder with diamond disc cutters so that should do the trick? Not looking forward to all the dust but it's got to be done. As long as roughly half a block on top is fine then i'll go ahead & do it because i think i'm all tooled up for it.
Using concrete blocks to edge some soil but 2 full blocks would be to high. I'm using 440x215x100mm. Can i cut length ways & mortar them on top to finish it off? Would it be ok & look ok like that?