Array Radius confusion

I’m making progress dialing in my system.

One thing I’m noticing is some disagreement in the antenna radius.
The spreadsheet lists “Unit Radius” and “Max Radius”.
My Arrow array has outer holes at 80cm, which is less than the max radius number, but lager than the unit radius.

When I enter 80cm and 144 MHz into the calculator in the kraken’s web page it tells me that the array is too big, but the numbers from the arrow web page say it’s right.

I haven’t tried running the spreadsheet on my tablet yet, but likely I will need to do that.

So is Unit Radius or Max Radius the right one to use?
What is actually the difference between the two?

Unit radius is a dimensionless number used in the final calculation, so don’t use that. Max radius is the correct value to use.

An 80cm radius will work up to 159 MHz, and will be fine on 144 MHz.