Surely the pressure presently being put on the likes of Nick Morris,Josh Grajczonek,Steve Lawson,Steve Worrall etc to provide guest cover for injured or unavailable riders in both Elite and Premier leagues at present is unsustainable and unfair to their own clubs. The chance of them picking up injuries themselves is ,by the number of bookings they are getting ,very high. They are professional and have to make a living but a limit to how many times they guest for the same club is surely sensible. Imagine these four riders are out through injury - watch how many teams struggle to find adequate replacements.The present rider shortage in the UK is at breaking point at the moment.Lets not make it worse by overburdening the fit riders who are left.