Stop in for a cup of coffee

Dang, just drove 9 fence posts in the garden/orchard area, 6 1/2 footers to slide the aluminum pipes over I picked up to support the spreaders for the netting. Was told these pipes fit right over but did I test that before fence post driving, nope. Sitting here trying to think about options, the tube will almost fit over on one end but the other end has a taper to allow them to fit together. Can get power to the garden if I was going to try to sawsall or grind them down. Trying to think if rebar or tubing could replace the fence posts. Also thought about digging a 1 ft deep hole in each fence post spot and pouring concrete. Any ideas, please advise before I jump off of the cliff lol!