I have a Aerocomposite 3 bladed prop and I had to really elongate the slot under the cowling to be able to get the cowling off. I made a cover plate for this opening that I use with nut plates and screws to attach it.
When I take off my cowling I put masking type tape on the gear leg fairing so it doesn't get bunged up from the cowling and I had blade covers made for my prop so they don't get bunged up.
To be truthful it's not the easiest task getting the cowling off but once I did it a couple of times, and cussed a lot, I've kind of got it down now where it's not real bad. I have to lift the back of the cowling up to allow lowering the cowling forward to go down the gear leg and clear the prop blades.
I would attach a photo of my prop covers that I had made but I don't know how.

If you would like to see the photo of them e-mail me and I'll send it to you. Trust me they are worth it.
Wayne Edgerton
N602WT