Pinless peepers??? Tell me more please..I use a nail file to trim the beak of my EE who has a slight crossbeak, to make it easier for her to eat. I would not trim due to behavioral issues arising from housing, diet, etc., as I feel like I should try to address those first. Have you looked into devices like pinless peepers?
Adding a rooster is not likely to cure aggressive hens.Maybe adding a rooster to keep them inline but don't wish to sell fertile eggs as food even though they are refrigerated quickly, they could have a red dot in the the yoke.