Stu
Watch the XR pad carefully. Many ribbed carpets, especially the finer, can be susceptible to pilling. For this sort of work, if extracting, I prefer to use a 3M Carpet Skimming Pad, or at a push the gentlest white floor polishing pad (3M colour coding). In the absence of a suitable pad, don't underestimate the efficiency of a bonnet for agitation.
Your wanding will be enhanced with a glide.
Bonnet after rinsing will aid drying and help with low spots "missed" by wand.
Safe and happy cleaning

The Ken