Thanks for your reply. WI says no way their 16t FW can be used with a 1/8 chain so that is out. Omnium comes on the bike so I have to use a 1/8 chain and I'd prefer to keep it for simplicity and no new tools to buy. Rolf told me they recommend using the Excess FW. Can't buy one in this country, but Retrogression sells them for $30 including shipping so I guess my problem is solved - except I don't know about the chain line until I get everything set up. Probably will be fine. What's the worst case? Noisy chain? Parts wear out a little quicker? The FW and brakes give away the fact I won't be doing anything super cool on it...