Hi all. I have a 58 cm Surly Cross Check, which seems to fit pretty well, generally. However, I'm hoping to shift my weight forward a bit more, and I'm thinking of moving my stem down to do it. The head tube angles is very slack, so it seems that taking the stem down a spacer or two will also shift it forward pretty dramatically. Will that accomplish shifting the COG forward as well? Any downsides? Thanks!