Question about erect ears!

I want my dobe to have erect ears(he’s 8 weeks so i need to start now if i can). I will not crop them, as I personally just don’t feel okay doing it to him, but if I used an ear posting kit would they still stand? Ik his ears would look pretty big and batty if so, but wanted to know what the best way to go about it would be! He shakes his head a lot and I’m worried about him getting a hematoma in them which is the main reason I’d like them to stand LOL

Also please no cropping debates! I don’t care if you do it, I personally just don’t feel comfortable so it’s not an option for me, thank you :)!!