Im wanting a removable fence post so gonna use one of them metal post mounts rawlbolted to floor so I can undo it and take it away to get car out. Im gonna dig hole and fill with concrete. Question is, to make it easier can I use http://www.wickes.co.uk/Postcrete/invt/221100 and smooth top over? Thinking about setting the bolts into it whilst its drying rather than drilling it after or would the bolts crack the concrete when tightened? Any help much appreciated.
thanks
Steve