Now that is a RUDE reply. I see you are a Brit, so that figures.
OK, enough kidding around, my reply to the O/P was certainly not intended to be rude but rather to educate.
I spent a bit of time researching his question/answer and then sent him a response by PM. In fact he is new to this forum, and as you can see I am not, so I was gently educating him with the accompanying nice SMILEY that it would be best to acknowledge the research that I did for him.
If you think that is rude then you sir are entitled to your opinion, however wrong it may be.
Cheers!