Unfortunately, the guest rules don't allow for that, and with the added rule of only being allowed to ride for one team in the playoffs, Sheffield had no choice but to bring in somebody who had already 'failed' this season.
We have struggled through the season unable to find a suitable replacement for one of the best riders in the world, and Fricke was our only option within the existing rules to have any chance of winning the playoffs.
As I said in another thread, had Bewley and Holder's injuries happened in reverse order then the shoe could quite easily have been on the other foot.