Devon got one of the braces out of his ear a couple of days ago, so I took the other one out too as the loose one was just hanging by the string. His ears were forward but not quite up. However, the next morning they were both almost completely up, except for occasionally the tips! They've stayed that way for several days. Here is what he looks like now:
I'm very pleased with how he looks versus when we started. I'm not sure if what I did caused this, or if it would have happened anyway, but either way I'm happy about it. I guess my remaining question is should I put the braces back on, or just leave them as is unless they start to come down again, as I know everyone has said that they keep the braces on their Sheltie's for months, and Devon has only had them on for a few weeks and he's still a week shy of four months old. On the other hand I know you all are mostly trying to get the tips to fold over, whereas I'm trying to keep him from having hound ears.
The other thing I've noticed now that his ears are up, is that they are huge relative to the size of his body! I'm going to have to start calling him Bat Dog! My previous Sheltie's ears were nowhere near this large relative to his body at any stage in his life. Not sure if they are going to always be that big, or if his body will catch up and they will look more proportional, but either way it's still better if they are up versus hanging down.
Comments and suggestions welcome and thanks for everyone's help so far.