Helix / Elite owners, need roller advice!

[Swordsman]

I've been doing a lot or research on the rollers for the Elite 250, and man am I confused. Specs say the Elite uses 24 mm x 18 rollers. Consensus seems to be the Helix uses 23 x 18 mm rollers.

AND YET I keep finding vendors and forum posts that list the CH250 AND the CN250 as the same.... sometimes they're talking about 23mm, sometimes 24mm. I understand they're all 18mm wide, so they all fit the variators, but man does it make it hard to figure out which route to go. There seems to be more choices with the 23mm, and I'm thinking that might be the better option since I've replaced the stock 3.5 tires with 120/90 Boppers, which are considerably taller. The smaller diameter roller will lower the gearing to make up for the taller tires. But I'm not 100% certain that'll really work on the Elite.

Any Elite 250 owners out there ever mess with the 23mm rollers?