[ccp4bb] RNA for crystallization

[A K]

Dear all,
I have a crystallization-related question. I am going to co-crystallize
protein with RNA. I ordered a short (10 mer and 14 mer) RNA from Dharmacon
but did not choose the purification option while ordering them due to the
budget issues. How critical is to HPLC purify them before setting drops?
Aren't RNA synthesis protocols reliable enough nowadays for such short RNAs?
Thanks,
Alex