BUFKIT is my go-to for forecasting wind gusts. I use MOS as a secondary source to corroborate my train of thought. With BUFKIT, I always select "Momentum Transfer" and click '10' (which stands for 10mb). The 1, 10, 20, 30 represent the thickness of a "barrier" layer in mb, where 10mb is suggested based on my experience in the field. When you select Momentum Transfer, the bottom number is the mean mixed layer and the top number is the wind at the top of the mixed layer. I generally use the bottom number (mean mixed layer) to give me a ballpark of what the wind gusts will be, and I use the top number only sparingly because most of the time that gust never mixes down to the surface since it is so high up. I refer to the top number more as a "worst case scenario" gust. There are other things you need to take into consideration as well when forecasting wind gusts such as cloud cover and strength of temperature advection (mainly CAA) just to name a couple but generally the values BUFKIT puts out are pretty good.