you don't need any system to bleed a Cayman, it has a built in system.
fill it, run it, pull the metal tab on top of the coolant tank on the top right of your engine.
you will hear the air escape
fill it up, run it some more , repeat
do not drive untill your car's heater produces heat.
You might get some filling done after the first run
but once the engine is warm and reasonably filled up with coolant, don't try to fill it, the hot coolant will just spill through the overflow hole, over your engine.
it's designed to push out in that direction vs spill inside your trunk, you'll notice pretty quick when you hear it surging on opening the coolant filler cap.
So for the last bit of bleeding and refilling you'll have to let it cool down.
But the car is already driveable at that stage, if the heater works, and you pulled the little tab on a hot engine, most if the air will be out.
If it surges at that point, it's already full enough to drive.
It's half an hour work,
15 minutes stationary, 5 minutes to bleed & refill, 10 minute drive
Then an afternoon or night to cool down, and 5 minutes to bleed & refill , done.