Does look like the chainline is a bit adjustable using the BMX conversion set, cone-races can be moved a bit on the threaded axle. THe axle itself is 130mm however so should probably only be used with an old-style flat crank, modern curved arm crank would have excessive Q-factor. Also note that the BMX conversion appears to have no dirt/water seals on the bearing, grit would be free to get into the bearings.