Just catching up. Did you go both nights? How was 2 Chainz? I really like that guy ahahaha. His early mixtapes are still so boss and if I'm ever in the mood for hip hop, it's my go to bump in the car and get my doors rattling lol.
I kinda suffer from this a little. I have had guys swear by oly bar curls, I guess just don't do em in the squat rack and do em when it's quiet in the gym lol. But yeah, straight bar curls and hammer curls have helped me but still have plenty of work to do there.
For inner tricep, cross body cable pulls. Pull the little handle thingy off and just grip the rubber stopper and pull really concentrating on getting the contraction in that long head and hold it there for a bit.
There's another thing this guy does at the gym but I don't have the flexibility for it - he gets uses the rope behind his back and reaches his arms up and then grabs it and pulls out and that really hits those inner bits. I've tried but I can't get it so I just use the cross body cable curls and dips.
Legs I have for days, arms not so much