Any Fiberglass stock you go with SHOULD be bedded. I would do Pillar bedding actually That’s kinda understood when choosing a Glass/Carbon stock.

But going back....why worry about the aluminum in the HS stock? Just have the hole bored & epoxy the spigot in. It wouldn’t hurt the strength of the stock or sacrifice strength of the bipod attachment. Won’t be a cosmetic issue, as it’s inside the forearm. Just go for it!