I'm brewing a big Belgian Quad this weekend, modeled after Josh Weikert's "Brew Your Best Belgian Dark Strong" from beerandbrewing.com. The grain bill is 11# Belgian Pilsner, 3# Belgian Munich, 0.25# Special B, and 2# D-180 candi syrup. Planned OG is 1.090. 90 minute mash at 148-150, with 20-minute mashout at 170, boil is 75 minutes and batch size is 6 gallons. I get about 88% kettle efficiency with my HERMS system, with the liquor/grist ratios I use, and my temperature-controlled fermentations run north of 85% with WLP500 Monastery Ale yeast; it may be higher with the 2# of candi syrup. A tiny Magnum addition at 60 minutes, a large-ish Hersbrucker addition at 20 minutes and some Styrian Goldings at flameout. If I can keep my bloody paws off of it, I plan to cellar it 'til fall.