I'm getting ready for my first brisket smoke this weekend. Brought home a prime full packer and trimmed according to what I’ve learned on here...left a 1/4” more or less on cap. Also trimmed some of the hard fat from the top, including where flat meets the point. Pre-trimmed weight was 14.9 lbs and I ended up with 4.5 lbs of trimmed fat. Is it normal to trim 1/3 of total weight off or could I have over-trimmed? Still had quite a bit of fat left on it, in my unprofessional option. I forgot to take pics of finished trim job or would’ve posted them. Any help appreciated.