All the licensed guys from germany I've talked to in de.sci.ing.elektrotechnik would not under any circumstance use neither choc blocks nor U-boats, only Wagos. They say all srew connections will loosen over time, whereas spring loaded connections like Wagos won't. Perosnally I use choc blocks and if the screws are tightened properly I've never had any problems with them. U-boats just feel flimsy to work with and Wagos are a bit suspect to me. Too high-tech.
