If you are in Illinois you aren't that far from Kolar. If I were you I would go up there and try some stocks and find out which on is right for you. Jeff is an amazing stock fitter and he is one of the nicest people to work with.
I have the #4 stock on my MAX TA combo. I like a lot of cast off so this one fits me really well. I have the comb all the way down and with the adjustable rib I can dial in the shot pattern so that about 90% of the shot is just above the bead. I am 6', long neck and I do not have to crawl this stock or tip my head to the right to see above the barrel. I am looking right in the middle of my prescription glass lenses as well.
I am not sure if this helps you much, trying the gun would be of benefit. I was able to try a Kolar with a #4 prior to getting mine. I suggest you try the stock you will be getting if at all possible.
I got my second Kolar max ta on a Thursday and the next day ran a 100 straight in a ATA shoot. It come with a #1 stock.
My first Kolar had a #2 stock so I thought I needed a #2 instead of a #1 so I got a #2. I also ran 100 straight with the #2 so I don't know which # is right for me. Go figure.
If you have decided to buy Kolar, I think you had better arrange a trip to Racine. And a date with Jeff Mainland. Responding to John Harden would be positive. They will answer your questions. Meeting The staff at Kolar is necessary. They have made the Kolar Product wha it is.
Made in Wisconsin , EH !!