Not really Pyrocat HD, but I have used Rodinal 1:50, tested with 7 and 8 minutes and there was no problem to get at least a decent full-tone negative with that combo. Exposed in daylight at ISO 80. Don't know yet how it will print but it looks promising enough, to keep on working with nailing the development more accurately.
Ortho + is basically FP4 without red sensitisation-I've used the times for that no probs. 9 mins at 64/80 should be a good start {I used a Combi tank with 10 secs agitation every minute}.