Richie
DFC 210 is a dedicated pre-spray in powder form.
DFC 105 is a Woolsafe Approved Carpet and Upholstery pre-spray, in-tank cleaner and a carpet rinse agent.
Although in liquid form, DFC 105 is, I believe, the same chemistry as DFC210 except the 105 has an extra ingredient to bring it into line with Woolsafe requirements. Chemspec claim both products to be from sustainable resources and biodegradeable.
Neil
I have only ever used Prochem's Citra Boost as a pre-spray additive. I've never used it in a rinse. IMO there would be no need as in the pre-spray it would dwell longer so have more time to do it's work.
I have a concern that d'limonene may not be free rinsing so I always take the precaution of using a rinse agent.
I have successfully used Citra Boost many times with microsplitters and DFC 105.
Safe and happy cleaning

The Ken