Engines with no coolant expansion tank - swirl pot only

[lancepar]

What do you guys without an overflow/expansion bottle for the coolant think about using one of these with a long dangly pipe for the excess to escape, (I'm assuming that's how it works) rather than it making a mess down the swirl pot and nearby areas which happens if too much coolant is added to the system. Yes I know once the level is correct it don't do it again. Once it has found it's level the plain cap could be refitted.

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My Griff has probably been fitted with a replacement swirl pot with a stub for a pipe to an overflow tank like later cars, but I don't want to make use of it because once burped out the excess it's fine.

[Barreti]

You get used to where the water level needs to be. Mine is just touching my big finger when I poke it in the tank. Mine has only overflowed once, before I learned of to fill it above big finger level.