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Here are some ideas we had that were still available in California. Anything in parentheses is a symbol for the kids plates.
(hand)SMTSLA
(hand)SMMDLS
CLN+FST
(heart)R TSLA
TES(heart)LOV
I saw your plate in person at the Menlo Park coffee and cars event. I didn't think it was a problem. The little subscript (2) is obviously not part of the plate. Maybe a Palo Alto meter maid gives you a ticket while parked somewhere. I highly doubt a real cop pulls you over just for that.
Loved the variations on this and decided to add another to the California DMV queue. Ordered today. I get my Model S Aug 31 so I assume I might have the plates by then.