It looks fairly similar to how I posted Athena's ears, they look so cute with posts
It looks like you are doing a great job so I'm sure you don't need any tips on posting. Just don't give up! IMO, not to insult anyone, if the ears don't stand it's the owners fault. Don't give up on posting, keep at it and they will stand. A dog with bad cropped ears is doomed if it ever ends up in a shelter god forbid. IMO don't crop if you aren't up for the work. People have told me I was a bad careless owner for owning a dog with cropped ears, but in reality cropped ears are a heck of a lot of work and makes you a devoted owner!