You are definitely on the right track. You dug out what you could and bandaged. However in the future, after you dig out the hole completely, use neosporin, (with no pain killer). Stick the tip right down in the hole and squirt it in. Massage the pad really well to work the meds in. Then repack it with more neosporin and bandage. Bandaids are good to use. Put on 2 or 3 of them and then bandage with a vet type wrap. You can get some really good human grade stuff that is rubbery and very elastic like in the pharmacy area. It goes on, sticks to itself only and once on, acts like a cast. That way the birds can be outside and even take dust baths with no dirt getting into the wound. You want to keep the feet as dry and clean as possible.
Now you want to unwrap the foot each day and check for more gunk. If the scab looks yellow pus colored, then you will want to open it up and drain it out. Squeezing, working the pad. Soak the foot in iodine, (Betadine is good) and warm epsom salt water. The epsom will make the infection come to the surface. Repack with neosporin and rebandage. Keep doing this everyday until the wound and scab look like regular flesh. Sometimes the very next day the scab just looks like a healthy red scab. Other times it looks gummy and yucky.
I am working on a girl now that I had originally used Amoxicillin on, however the Amox did nothing for her and now I am giving her penicillin injections.
Keep at the feet. Bumblefoot is a wicked infection and use precaution on yourself as it is a staph infection. Sterilize your tools between birds so you are not sharing any bacterias between them. And wear surgical gloves in case you have a cut on your hands, you don't want the staph either.