Aside form recovery, another thing to consider is how you ride. If you're naturally a gear masher instead of a spinner when you ride (and to some extent you probably are just by virtue of how many miles you've ridden on a SS historically) then the extra weight may help you go faster where it matters on hilly courses. Either way, though, I wouldn't get myself too wrapped around it if I were you. This shit isn't your job, so don't overthink it - if you feel good on the bike at a given weight that allows you to have a normal non-monkish life, stick with that. It's not all about the weight. You're already a strong rider and unless you stop altogether and just spend all your free time eating donuts instead, you're going to stay a strong rider even if it's at a slightly higher weight.