We used to have a similar but shorter mare who lived with us for over 20 yrs until she was 31, I am sure you will have years of fun with this lad. Make sure you keep us updated
(Just because you said " new best friend" in your post - Please remember there will be some teething and getting to know each other stuff, don't let that bring back any memories or feelings from what you had previously - just enjoy him! )
Thanks everyone, I hope it all works out. I appreciate there will be some initial teething issues and there won't be an instant partnership but I'm hoping that will come with time