Chuck stuck on spindle....Help

[Micktoon]

Hi Lads thanks again for the in put, I think I will have a proper look for a new back plate first then if I can not get one think about making one and only use this one after making a dummy spindle nose to test and teast this one again on as I will be kicking myself if I get it stuck again and damage the spindle threads.
Greg it was the first cut lol, I was not even at the stage to cut anything when it was found that the chuck was jammed on., so it was desperate times call for desperate measures .............. so the first cut but I hope not the last

Cheers Mick