Hey DW I take it you are looking for another challenge I hope this one goes better for you than the previous ones. I bought the excalibur but it was question of timing, the axminster version is one I certianly would have looked at. Tony is very pleased with his and sold the sliding table, maybe that's an option you could take? He will also be able to tell you the bore but under the specification tab of your link it says 30mm
Be aware that the arbor diameter varies between the SIP and SIP look a likes. I have the saw from Lyndhurst Woodworking (via ebay) and my friend bought a SIP - my arbor was 30mm whilst the SIP was 25.4mm
Thanks Colag for the tip. I think it most probably goes back to that thread I posted re buying saws direct from China there werequite a few mfrs over there.