I was happy to find a opensource keyboard software that has a splitkey design.
But sadly this design is still very unergonomic. I have to bend my hand hard to reach the space bar with my thumb on the landscape mode.
Thumb Keyboard has there a much better solution:https://play.google.com/store/apps/details?id=com.beansoft.keyboardplus
you can easily reach one of the 2 space bars with a thumb, also they did the backspace bar on the homerow which is easier to type I think.
Would love to get at least this spacebar fixed it makes using it with both hand attached to the tablet impossible.