Just received the BMW crash bars from Revzilla without the instructions. But a call to them and the sent me a PDF version. In looking at the instructions, one mounting point requires drilling a hole into the plastic footboard. Then later on, a bolt merely goes into that hole without a nut on the other end. So looks like only one mounting point on each side goes into a strong metal frame part. Anyone have experience installing the BMW bars for a 2019 C400X? I'm inclined to return the whole thing and go with Wunderlich or Givi bars.