Thanks TD.  I listened to the video introduction of the new course by Grover & Narayanan and the philosophy/approach seems quite attractive.  In particular, the emphasis on delaying commitment of the c-pawn to leave open options with c2-c4 in selected positions seems wise to me.  I also like that it has a chapter devoted just to early move orders.

I am interested in exploring the London System as a backup opening for White.  I was wondering which of the two Chessable courses an experienced London player would recommend?  The impressions I've gotten reading about the two courses leaves me undecided.  Liem Quang Le is obviously the stronger player but the descriptions I've read of his course describes it as possibly a "safer" repertoire (reviewer opinion).  Banzea has an impressive YouTube presence and has specifically included content for beginners but also seems to have a practical and fighting approach to the London.  I'm rated in the 1900's (so not a beginner).  I realize the London is a system opening (which seems appropriate for a backup/alternative opening) so I am looking for enough knowledge to get a decent position out of the opening to allow me to outplay my opponent.  Thanks in advance.