A crucial RP protects the top of the route. Craig found he couldn't place the piece reliably so opted to pre-place it instead. Even clipping the pre-placed wire was so strenuous that he opted to velcro a quickdraw to his t-shirt to speed up the process! 
On the RP, Craig noted:
If you go and try 'Hard Cheese' and you want to drop a rope down the crag to do this, then please do not use this 'RP' placement, to clip your abseil rope into – this placement is both fragile and poor. It needs to be preserved for those on the lead. The placement only works with a downwards pull and an outwards loading of an abseil 'deviation' will strip it – many thanks.
 Interview with Franco Cookson https://www.youtube.com/watch?v=o72LLws0gEQ