Lara
Well...I offered to help and got here late!
Those calipers are just perfect. I guess I need to know where you are having problems?
When I dose, I use the calipers, a 3x lighted magnifying glass, and a small light box so I have light above and below. I got the light box on amazon for about $30.
So please let me know where the instructions are confusing and you have questions. I did not measure BDs but it really doesn't matter. If you just get a really good BD syringe with correct markings, measure how much insulin is in 1u and divide by 10. So if there are 1.5mm in 1u, then each 0.1u dose change is .15 mm adjustment.