I drilled a hole for a 15mm pipe with an SDS drill I borrowed through a plastered block internal wall. Trouble is, it was out in the vertical by about 5-8mm. No amount of wriggling seems to get it in line - the ends just get bigger! I think the answer is probably "no", but just in case, is there any cunning way to move such a hole upwards by a few mm? Thanks in advance,
John