I have this morning started assembly of a new PC in an Antec P180 case, all going well until I started to insert the motherboard to standoff screws. The only screws that are a) long enough and b) fit the thread of the standoff, have 'washers' fixed to them which seem to me much too great in diameter. They overlap conductor runs and in one instance would crush what look like chip capacitors. The motherboard as Asus A8N-E. Am I doing something wrong? Please help me.