That's a long title but at least you don't really have to read this!
After uploading an accessory 10 times and not being happy with the results, and I also would like to add or tweak or script effects into such things in the future...
Please add ability to edit accessories (that one has imported) for finishing touches, corrections or extra additions.
Maybe in not too far off future ability to simply import into main inventory, tweak, edit script and light, and then sell and configure the body attachment part from there.
At the least ability to edit accessory after upload, and maybe an option to take a studio picture of it.