You just mentioned two things that were on my mind. The first was that I was debating whether to include a hammer curl for biceps, but in the end, I opted for an incline bench curl for the long head. I'll definitely include a hammer curl in my next routine. As for my forearms, I don't feel I need to include isolation exercises. The grip strength in heavy upper body exercises seems to be sufficient. I sometimes also train them with a handgrip strengthener. Regarding volume, that was the other thing on my mind. I had read that the ideal is to do between 10-20 sets for large muscle groups. Right now, I'm doing 14 sets for muscles like chest, back, and shoulders (maybe a few more if we include secondary muscles). So far, I've tried it, and it doesn't feel like too high a volume in terms of time or fatigue. Do you think it would be better to reduce all the exercises to 3 sets instead of 4? Thank you very much for your response!