I have that same pan from Wally World and it works pretty good. I recently got a Mityvac evacuator from my wife as a gift, I have not tried it on the Boxster yet...but it worked so well on my E36 I can see it as my goto from now on involving removing liquid from "Things"
http://www.zoro.com/mityvac-fluid-evacuatorbrake-bleeder-pneumatic-07300/i/G0973174/?gclid=CjwKEAiAmeyxBRCJxoKk7IWLl2oSJABvZjhh5dWFZy5 vbXdF4gA07hePNF3TnZknQxr6k3trP6ljCBoC9Tnw_wcB&gclsrc=aw.ds