Winter is about -5 up to 10 degrees C here (23 to 50 F), mostly above 0. I have albion three season tights (thermal fleece top, windproof panels around knees) that are pretty good down 2-3 degrees and up to 15 or so, really good coverage. Around 3 it gets a bit unconfortable. Now, I would like to extend the lower range of the tights to feel comfortable at freezing temps, if possible up to -5. What's the best way to do this? I know other roadies avoid overpants for some reason and some wear running tights over short bibs, what's the best way to do it with tights? Something thin but comfortable to protect my junk as well as keep legs warm.