I don't know how committed to stainless you are but this is an alternative. We use it in my auto shop for every brake line job. This line will bend by hand and flares perfectly every single time.
https://www.amazon.com/S-U-R-BREZ10...g=8Xy8g&pd_rd_i=B0027AL424&psc=1https://www.amazon.com/3M-Auto-Parts-PFT409-Fittings/dp/B0792KXDP9/ref=sr_1_2?keywords=sur%26r+flaring+tool&qid=1651686558&sprefix=sur%26r+flar%2Caps%2C113&sr=8-2
https://www.amazon.com/Ridgid-38028-Bender-Model-603/dp/B00A336KF8/ref=sr_1_4?crid=1C7J1ABSXYQJ&keywords=ridgid+3%2F16&qid=1651686573&sprefix=ridgid+3%2F16%2Caps%2C582&sr=8-4
https://www.amazon.com/Akozon-Handheld-Straightener-Straightening-Straight/dp/B09NBHDB3V/ref=sr_1_3?keywords=tubing+straightener+3%2F16&qid=1651686696&sprefix=tubing+stra%2Caps%2C155&sr=8-3
The SUR&R tool, Ridgid bender and tube straightener are an investment but you will never ever regret them. Running lines becomes a joy.
If it's a one time job you could always sell them on ebay. There is just no comparison with how easy they make running line.
Edit: not sure why clicking wont open the links but copy and paste works.
