BPs always have a "clear" phase after the go dull and have cloudy eyes. This lasts a few days before they actually shed. Since yours just went clear, you probably have a few days before there will be a shed. Keep the humidity high until you find it.
Also, no way is a 300+g BP from 10/2018. I have 6-8 month olds that aren't even cracking 200g yet (close, but not yet). Unless this one was very heavily fed??? But I really don't see that as likely.
Breeders will typically feed somewhat small meals to keep them from outgrowing the tubs they have available as they try to sell them, so yours was probably maintenance fed or was an initially difficult eater who grew very slowly at the start.
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