Why the need for spacings for us for? Just fasten them onto the blank and load it up. No one here knows what blank, where or how you have cut the blank, whats the action and so on.
What guides, what sizes, how much power the blank has. When you get into this size class of rod you need to be sure of what your doing.
1850mm is way to long for an 80lb stand up. Is that just the blank or measured with the bent butt fitted?
Im not trying to be a smart arse here, just trying to help.
Stu