Inline rollerblades & Airport Security Control

For a low-cost traveler like me, how to take rollerblades as hand baggage has never been something taken for granted.

First, you must make. My size is of 37 so it is quite OK. But for people with feet of 42 or more, 

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Here is the list of airports I have tried - Luckily, have passed all of them by now:

Portugal:
- Lisbon
- Porto

Spain:
- Sevilla
- Palma de Mallorca
- Barcelona T1
- Barcelona T2
- Girona

France:
- Paris Charles De Gaulle
- Beauvais Tille
- Lyon

Switzerland:
- Geneva

Germany:
- Frankfurt Hann
- Lübeck

Finland:
- Helsinki