Thanks Neglify and Post Praetorian for your input. So far I have added a short introduction and am currently reviewing the existing written work to see if I am happy enough to leave it as-is. The original is really 95% of what I wanted it to be, and with the remaining details that I wanted to add in a postscript I will probably be completely satisfied. I don't think there are any errors to speak of.
EDIT: The introduction has been finished and I have decided that a formal postscript is not necessary. The eulogy was posted, in its original form without any changes, a couple hours ago on Facebook and the feedback from friends is that it is a very moving tribute. I will have the option to post any further details in the comments over the coming days as I think of them.
I truly appreciate those of you here at OT for your thoughts on this matter, I thank you again.