The Bitstream settings say “Control value position 1 (V1) = 8”. This is the 00 byte before F7 in the Message. Also it says “Insert sysex checksum = yes”. So Bitstream will do that for you right between the value byte (00) and eox (F7). So the message I´ve suggested for Ctrlr should be correct.
I suspect I might be missing something on the D50, but after re-reading the manual and more, everything is setup how it should be to receive Sysex.
I think it has something to do with your settings. Could you post in detail how you´ve set up your D-50? Relevant params like RxChannel, DeviceID…