I think it's now standard that, not just for Gunpla, but for basically any plastic model, all you need is a pair of nippers and a design knife. However, a recent trend in Gunpla has been kits that don't use polycaps and use KPS. For those who like to paint, this is welcome because, unlike polycaps, they can be painted.
　But KPS can sometimes cause a phenomenon that breaks our spirits at the initial assembly stage. Yes, and that's...
Axle thread breakage...

This axle thread breakage was previously a problem with ABS joints (old

Do you also sand the assembly? | アデスの木の枝's Gunpla works