Well over a year ago. And it sounds like I did it the way you are. I always prefer a gap between the course and the test. Did it that way with CWI and I do it that way with API. The course, of which I think Code West is quite good(the 510 guys seem especially knowledgeable), helps establish the target subject matter, then you have extra time to study before the test. I took Code West in Houston on Westheimer, and took the test in Charleston WV.
Some criticize the idea of study for the test. IMO I do not have a problem with that because you are only establishing a foundation anyway. YOu will learn on the job. Always. Always.
And in any case, if you wish to get more out of it than test study then ask questions. They are always helpful in answering. You get out of it what you put into it.