A simple solution would be to drill holes on the plastic housing of the station, around the outside edge of the rain collector to install the spikes, but I'm not going to do that, because if I damaged the housing I will have to buy a new outdoor unit, and here in Brazil it's absurdly expensive to import these stations (I paid 95% import tax over the price of the station, 60% federal tax and 35% state sales tax). So, I'm not going to do anything that can cause any damage to it. If they were cheaper to buy here, I could try that solution.