Dan,The importance of practicing the lefty BS - is even greater when playing on the 5x10, as even taller players will have a stretch from southpaw side of the table. This is where the Pro's should be playing Straight Pool anyhue'.
Just curious: Do you find side pocket BSs more tempting on the 10 ft. Diamond? The only old 10’ tables I ever played on weren’t the typical modern styled (Century/Anniversary/GC/etc.) Brunswick, and I don’t really remember how tight the pockets were (just thinking about Greenleaf’s reputed predilection). Well worn slower nap cloth & clay balls could have made long shots into a corner more risky by comparison back then (?).