Just to be absolutely sure, I downloaded the 20110411 firmware from
viewtopic.php?f=3&t=1075 . Loaded the firmware into the test board.
I now did it without MDM.
2. Changed BowSO to 1.
3. Changed P1 to 7 on all Custom Curves.
4. Saved to Config slot 1.
5. Set AutoLoad Conf to Yes. Waited for the menu to exit.
6. Switch MegaDrum Off.
7. Switched MegaDrum On.
On all Custom Curves P1 is 7 and BowSO is 1.
I did the above steps twice - one with MaxInputs set to 18 and another with MaxInputs set to 56.