Rollei Infrared 400 and 510 Pyro in Jobo CPE2

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Need help in determining dev time for 35mm and 120 Rollei IR 400, rated at 400. I’m using a Jobo CPE2 and 510 Pyro 1+100. I’ve read quite a bit about the film being rebranded Agfa Aviphot 200 and beginning to wonder if I should have rated at 200. There’s nothing important on the test roll but would like recommendations of where to start.

I have recently developed Ilford HP5 successfully using the above and the dev time was 8 mins at 21C. Should I use this as a start or should I add 15% to compensate for rating at 400?

Thanks in Advance