...tazman... I plan to do just what you suggest, work out a method that sets the cheek rest the same each time.
Also...part of the struggle has been having too much of the outer 'white' ring showing from where I see the whole thing, the whole sight picture lined up on target.
https://i.imgur.com/jyf94dH.jpg
This front globe has been about perfect for the inner hole that centers up the 4" spot but the overall diameter of this globe is a little too small...it makes me dial the iris down very small to make that outer white ring more manageable...too much width in that outer white ring showing makes it easier to be 'off center' in the peep, I end up looking at this ring and then checking the spot over and over & pushing my breath window. I need to concentrate on the 'entire sight picture' all at once instead of examining the various parts of it individually....I hope that makes sense?
Also if this globe was a larger OD, I could leave the iris more open allowing more light & clarity...dialing down the iris for that globe pictured above makes a gloomy overcast day really hard to shoot as that 'lint look' starts to interfere.
Good ole'
HARRY TOBIN & I sat on the phone last week talking about this as I was measuring the globe and Harry came up with the idea of making custom size globes on his 3-D printer. He made a couple and was happy with how they turned out so he had me send him one of my globes so he could really dial the printer in exact.
From what Harry says, I'm getting some globes that have finer cross bars in them with the desirable characteristics of several globes worked into one.
Then he made a variety of globes based on 3 different OD's with a combination of 3 different ID's, I think he said 10 of each...so that's about 90 globes coming in this week.
I can use a drill index to adjust the ID's if needed but from what he's done I don't expect that'll be necessary.
I hope the smallest of the ID's will work as well with the 2" spots as the one above works with the 4" spots....smaller spots ='s more spots on the paper and a little more practice each day!
So...that's where we stand...today is a rainy day but Tu. - Thurs. look to be clear with highs in the 50's so I'll be back at-it soon...