One further comment:
Spa cycles say their design is unique for not just being serviceable but also for the end cap design and it's the first time I have come across any dyno hub that looks like it is easy to transfer/adapt for different axles.
It's the same hub that was in those Arkose dynamo wheels that Evans sold for a hundred quid (full wheel) that myself and a load of others on here snagged.
Came with all the end caps etc
It's decent
One further comment:
Spa cycles say their design is unique for not just being serviceable but also for the end cap design and it's the first time I have come across any dyno hub that looks like it is easy to transfer/adapt for different axles.