BTW, The SDS CML+ has some key combinations in the FW. If anyone wants to try them, be my guest:
key_combination.13722 - education_mode_key
0x0E, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x24, 0x2B, 0x2B
key_combination.13711 - record_pkg_ctl
0x32, 0x27, 0x24, 0x32, 0x27, 0x24
key_combination.13257 - set_update_cfg_flag
0x32, 0x0E, 0x27, 0x09, 0x1E, 0x19, 0x26, 0x26, 0x26, 0x26
0x09 - Channel 1
0x0E - Channel 0
0x14 - AutoSet
0x15 - Horiz Menu
0x18 - Ref
0x19 - Save/Recall
0x1C - Trig
0x1D - Math
0x1E - Default Setup
0x21 - Print
0x23 - Single
0x24 - Utility
0x26 - Menu (2nd Menu)
0x27 - Display
0x28 - Run/Stop
0x2B - Menu (2nd Menu)
0x2D - Cursors
0x32 - Measure
I'm not 100% sure of the keys decoding but I did my best. If anyone tries, please report.