How much clearance are you getting with those mini V's? Have you got a picture? The new V4 looks like an absolute pain to set up cantilevers with so I was going to go with V's.
Also what is the brake lever? It looks different to the normal tektro ones
Looks like you'd get more clearance if you'd sit the wheel a bit further back in the dropouts (i.e. so the tyre sits where the chainstay indents are). Maybe add a chain link or two and pull it back?
How much clearance are you getting with those mini V's? Have you got a picture? The new V4 looks like an absolute pain to set up cantilevers with so I was going to go with V's.
Also what is the brake lever? It looks different to the normal tektro ones