Well I've ordered the ER16 collet from fleabay http://www.ebay.co.uk/itm/ws/eBayISA...EOIBSA:GB:1123 and have had a go a boring the bearing housing. However my boring tool (went for the 10mm brazed tip boring bar http://www.rdgtools.co.uk/acatalog/B...ring_Bars.html) needs alot of grinding to get it to not rub...might see if I can grind one from scratch as we have a few lengths of tool steel lying around...still got probably 3 weeks to do it in before my ER16 collet arrives on these shores Thinking of which my bearings should be here from the US within the next week