Glad to hear you didnt get hurt, I've had 4 1/2" cutoff wheels fly off the around the arbor hole and never found where it went, theres no excuse for not being safe.
How do you plan to handle the keggle with out handles?
"Over Build It Or Don't Build It" (Raider11)
I actually tested out washing and cleaning it after I got done and handling it by the lip is not that hard. Even with some water in the bottom the weight I took off from the skirt makes it easier to handle. I have a brew stand where everything is stored on it and I just roll it out the garage door for use. I never lift kegs full of liquid so I did not see a big disadvantage to no handles. I am saving the handle pieces and will weld them on later if the need arises.
(1 Timothy 5:23) . . .Do not drink water any longer, but use a little wine for the sake of your stomach and your frequent cases of sickness.