Are all half length darts banned?

[florusparamount]

The rulebook says that stefans and homemade darts are not allowed. Does this include ALL half length darts? For instance, if I were to simply cut first party Nerf darts in half to fit a certain magazine would that be approved? Or would that count as a stefan?

[Sheppard]

You may cut stock darts to half length size, but no additional modifications may be made