Best solder diameter to use for PCBs?

I’m kinda making a mod right now and I know that 60/40 rosin core is the best way to go (please correct me if I’m wrong) but then now I have a choice between a 0.032 dia or a 0.062 dia solder. >_<

Which one of these would you recommend for a first time attempt with a 40 watt solder, and maybe for the future?

I’m trying to attach wires to a T5 like Hori by the way. Desoldering then soldering wires.


I always use as a maximum 0,0196" (0,5mm)! Works just fine.

Thanks! :slight_smile: Means I can buy either. Cheers.