Full custody

This morning I had to swing into a lawyers office in town to drop off paperwork for a insurance claim battle that I have been in the middle of. The lawyers office, ironically was across the street for the court house. I've been wanting to get a copy of  the restraining order my ex-wife placed against her new boyfriend at the time so that I could have for my records as my son lives with her half the time. that is something that she hid from me for a year. I didn't find out her boyfriend was abusive until she called me to find out if I could watch my son for the week as she just placed a PFA against her boyfriend. My son was living under the same roof  with an abusive alcoholic for a full year before she told me about it. This struck a nerve. There has also been talk in the past of me trying to obtain full custody of my son and it was something I just couldn't deal with at the time as far as bandwidth goes. while I was there I obtained a copy of the custody modification paperwork to review, and am going to consult with a lawyer about my concerns to see if I have the ability, or, have a shot at getting this accomplished. From what I have been reading online it seems like a tall order as she is not physically abusive, or doing drugs, she has a decent job and a place to live. 

However, this PFA will probably come in handy. she is manipulative,  he also spends a majority of his time at my house. we are split 50/50 on paper but he is here after school mon-wed.. I take care of a majority of his medical stuff, am there to help him with his homework five days a week. The list goes on. I need to create a list and then consult with the lawyer to see what happens from there. I may have to wait until Orion is able to legally express who he wants to live with and then get a modification at that point as well. I'm not sure how this goes. This is uncharted waters for me. 

List:

Time: I have my son full time Thursday- Sunday night + Monday-Wednesday 2-2.5hrs after school + vacations (fall/spring/summer) during the week

Homework support 5 days a week

I handle a majority of his doctor appointments and usually pay for them + health insurance

I get his sports schedules organized and most of his other life experiences such as sporting events, concerts, hiking etc. 

she's manipulative / narcissist

I believe she weaponizes my son against me and partners as he's been caught standing in corners listening to conversations

Had my son living with an abusive alcoholic for at least a year and didn't tell me until she filed a PFA against him. 

has burned bridges with most of her friends and her family 

**Update**

phone consultation tomorrow. Let's see what they say.