Thanks for your inquiry.
Yes, the free upgrade is still offered. With that, the height is 30" to 35". With the two fixed-length, the height is about 33"
There are numerous stools out there that adjust via a screw or a hydraulic cylinder. This is just a preference for each shooter and each shooter seems to have a different opinion. For those reasons, we don't stock stools. But check out your local stores such as Harbor Freight, Lowe's, Home Depot, Ace Hardware, etc. Try to find an adjustable option to give you the best flexibility and comfortable shooting position.
If you order through our website, there is an option for notes as you check out. Enter the option for free upgrade to 4 adjustable legs, and we'll get it shipped.
EWL