Sounds to me you have two really nice Sticks. Try working with them for a few years. I’m an amateur hobbyist player but I really love my 10s I’ve played 12s and they are great sticks. Being a simple player I have my hands full on my 10s but they suit me fine. I play SB8 and they are loads of fun. Don’t jump ships to fast regrets kind of hurt. Only my humble opinion. Best to you .

Good point. Also, @stickyfingers to your point, Jeff is quoting 14-16 months lead time on a Grand Railboard. We all know that means in practical terms, it would be more like 24 months! So I'd definitely have a couple of years into using both 10-strings long before the Grand Railboard arrived!!

Maybe what I should do is re-string the Railboard for Baritone Melody and see how that works. I already have a spare set of strings I could use, so I wouldn't even have to fork out $50 for strings. As mentioned above, the two pieces I've learned on the MR Railboard can both be played successfully (given some time to acclimate to the changes in string and rail/rod spacing) on the BM rosewood.

FWIW i think the added range provided by a 12 str ( especially on the melody side ) has real value. i found on some pieces like "spiegel im spiegel" to be very difficult to adapt on a 10 string, but worked out ok on a 12 string. i never found it harder to play than a 10 string myself.

I never adjusted to the spacing on 12-string instruments. I have tried to move to the 12r, but prefer the feel of the 10-string.