No2fast I'm thinking the CWA100 may have too much pressure for the SRT6 system and the CWA100 draws twice as much amps as the smaller CWA50. I will add a VW reservoir just as you have done, but do not want to add another heat exchanger. Taking that in to consideration I prefer the CWA50 as the SRT6 wiring to the OEM Bosch pump is 18 gauge.
How did you wire the pumps you are using? Did you run larger wire? Do your CWA50 pumps have three or four pins. There is no PWM available at the Bosch OEM pump only a ground and the 12v DC, how did you deal with that?