Hello, I'm the originator of this post and converted it to LME. This is not directed at you Grasslands, but is a response to some of your comments and what you have read so far from others. Don't listen to the whole adding sugar after the malt fermented!
Adding the sugar, candi sugar, beet sugar or whatever you want to call it NEEDS to be added at the beginning phase (at boil) as instructed. This is what the recipe calls for and has a purpose behind it. To others arguments of a dry(er) beer, you can still get down to 1.006 to 1.010 easily, it's all on your mash schedule. And it's possible to get an extract to 1.012, I have done it personally. I have NEVER EVER had issues getting the FG down when adding sugar during the boil. ESPECIALLY with a high attenuation of WLP500!
Now, the reason you add the sugar at the last minute boil phase vs. adding after fermentation is... One, keeps it sanitary. Two and importantly, it allows the sugar to be fermented first!!! key word, fermented first! When adding sugar later, you run into the possibility that you will only ferment 70% or less of the sugar, Opposed to having slightly more malt (for which this style was designed to have a small amount of malt left). Thus affecting the flavor and truly straying away from the style.
Guys, I admire your willingness to experiment and try new things. But don't pass your "Experiments" off like they are the gospel and tried and tested with OUT MERIT!!! Nothing annoys me more when I see someone new say they are going to try this and try their ass hat method with no follow up or anything to back in a diligent and scientific manner. The fact is, the original recipe that I posted is about authentic as you can get. And will get you to the closet style of the original beer, and other TRUE BELGIAN(s), for which I have been in Europe and tasted personally.
With so many new people coming on the scene and what I truly believe is the next revolution/renaissance of our time, we need to direct people down the proper paths. Sorry for ranting, I just want to clear stuff up with people on this post. It's had a lot of hits, and I had a lot of private messages and such.