I have seen a nice looking cnc aluminium C14 "extender" on taobao, to move the connector 1-2cm back, to prevent cases of interference. You can even stack 2 of them for better clearence.
Ok thnx, that is good to know. Also one other option would be to have holes for both positions, hmm I will have to think about it.
In the meantime:
BTW if you are familiar with tools assembly takes less than 1 minute, id you are not I cannot imagine it taking over 5 minutes while following the manual.