Simpson injector bypass drill questions

I’ve been reading like crazy but…
Simpson 3835 with dreaded built in injector. (June 2020 replacing ok? )

Anyway. Pulled barb and it’s little friends beneath it. Plugged with tape/plug.

I keep reading about drilling but no bit size. One post says 3/8”? Not saying it’s wrong but it’s the only post I’ve found. (I’m wearing out search engine)

If I went 3/8” the check valve in injector would go through hole. Is check valve to come out also? (See pic, part #96)

No problem drilling this sucker (if needed) but thinking this is a measure twice moment so I’m asking.

Tossing GP High Draw 2-3gpm on once reassembled