Keep it original?

[ricknewman]

Thanks for the advise guys. I can't decide whether to use 1/2" core as was originally used and build it up to 3/4" to match the remaining lip or use 3/4" core and shim the ledger down another 1/4" to accommodate the additional thickness of the new deck so that it's not sticking above whats left? By the time I add glass to both sides the new deck will probably be an inch.