It's nice to have both.
I run both.
I use the adj wastegate to set my base boost level, then use the RJC to go higher than the base setting.
You can use the RJC without an adj wastegate, but you will be limited on the high side boost level you can achieve due to spring setting on the non adj wastegate.
HTH
Patrick
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Torrid Red '05 A4 GTO. Baseline best of 13.34 @ 105.9 with only a K&N CAI and a Flashpaq.
Dark Blue Metallic, '87 Turbo T. Best 60ft 1.65, Best ET 11.72, Best MPH 115.41. Her name is Sarah, and her words of advice are, "Always make sure, the juice is worth the squeeze."
Dark Slate Gray '86 T-Type RUQWKNF, Best 60ft 1.45, Best ET 10.07, Best MPH 135.6. Sold in '05.
White Chrome '87 Turbo T Limited, RARE T Best 60ft 1.52, Best ET 11.07, Best MPH 120.7. GM High Tech Magazine, Nov '98 issue. Sold in '98.
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