Hi Steve,
I don't remember it being difficult, instructions here:
https://forum.vintageairgunsgallery....03-strip-down/
I understand how you feel though, to be honest when I first started collecting I thought I'd never take any of them apart, for fear of either damaging them or not being able to put them back together.
That all changed when I first took apart a Webley spring pistol and found it was easy to do and the pistol shot a bit nicer after a service.
Since then I do it with both pistols and rifles and I think it really closes the circle of the collecting experience: Learning the history, learning exactly how it works and then seeing how it shoots. Also I feel I've done the gun a service to ensure it's shooting at it's best, that's what it was made for after all.
It gives me a more rounded appreciation of an old airgun.
I'm not very mechanically minded but thanks to the idiot's guide on here, and several other resources it seems it's always possible to find out how.
What's the worst that could happen? I think the benefits outweigh the risks every time. That side of it has become one of the most enjoyable aspects of collecting for me.
Sometimes it's good to do something scary, I was terrified when I took that Kuchenreuter Bellows gun apart, but it's one of the most rewarding airgun services I've ever done.
Cheers,
Matt