The foundation looks well done, getting soil tests is great, but 25G is not rated for self support above 40ft. Period. You need to guy it. In current configuration it will fail near the base in the first strong thunderstorm with winds in the 60mph+ range.
Look here: »
www.rohnnet.com/rohn-g-s ··· ng-towerRead the brochure, you will see 25G rated for 1.5 sqft of antenna at 40ft, nothing higher.
You can fix this easily and quickly. At 60ft with your small antenna load even one set of guys at 40-45ft would put you in MUCH better shape. Even just some $15 4-foot screw-in anchors and 3/16" cable from the hardware store would be a decent solution, if that's all you have available. Under $200 and maybe 2 hours time.
I've built about 40 25G towers, as tall as 160ft. They can be an excellent value in towers for a WISP, you can cheat the spec a bit on shorter towers, but you're pushing it too far on this one. I don't know you and don't have any interest in whether your tower fails. Just trying to offer advice to help the overall WISP community. Take it or leave it I guess. Feel free to PM me if you'd like to discuss further.