Thanks again for your pointers Royce.
I've been following your advice and have certainly made progress. I've got Rainer's JX8p Preset open in BC Manager and have started changing encoder and button settings to my imagined JX10 layout.
The snag I've hit is when I attempt to change the relevant sysex under the Custom Output column. I can get myself to the window that says BCR2000: Preset 1: Encoder 1: Line 1, which shows the sysex string broken down into ten columns. Then I'm clicking the button marked T (Edit All Output Items As a Single Line of Text). This opens yet another window called Output Statement. When I enter the sysex string for my JX10 parameter and hit the OK button I get this popup message: Error 10: Invalid numerical argument.
I'm guessing that this might be occurring because Rainer's sysex string contained 10 elements ( F0 41 36 0f 21 20 01 0B VAL F7 ) whereas the sysex string I'm trying to replace it with contains 11 ( A F0 41 39 00 24 20 01 0B VAL F7 ). The tone parameter sysex for my JX10 all begin with A or B to denote whether the parameter in question is for the Upper or Lower tone (not an issue with the JX8p).
I thought that perhaps adding an 11th column to the BCR2000: Preset 1: Encoder 1: Line 1 window's ten sysex columns might solve the issue, but when I attempt to do that by hitting the Insert New Item button I get a window called Custom output item 1, that has many options beyond my sysex knowledge to choose.
Any advice/ideas welcome! Either way I'll be back at it tomorrow with fresh eyes.
Cheers,
James