The new axles look great, and apparently gearboxes are just around the corner (or soon will be).
This potentially raises the possibility of building another one of my dream builds - an industrial revolution era red brick mill, in which a single large steam engine turns a shaft running the length of the main hall with individual machines taking power from that. Until now there has been no way to do this.
For this to work, ideally the gearbox would have at least 3 active faces: a main input, a main output, and one or more side outputs. The main input/output RU/t maximum would be determined by material as for other similar GT blocks. Ideally the side output power would be configurable by screwdriver to any amount up to the maximum*, implying there should be no minimum on the main output. Subtract the side outputs from the input amount and then just output whatever is left through the main output. For maximum flexibility, also allow main output face to be selected by monkey wrench.
Does this sound close to your current plans?
(*A simple one-tier-lower output would be unrealistically wasteful for lower powered machines. IRL the output end of the shaft can influence the input end of the shaft, but in GT6 all power types move in only one direction, meaning that chaining multiple gearboxes one after another wouldn’t work as expected. Also, if the side-output is limited to 1/2 of the maximum, which might at first seem reasonable, you would either need to make the main output configurable as well or it would break any system which has the more powerful machines first on the shaft before less powerful machines. Allowing the side output to go from 0 to the full maximum would be the most flexible, most realistic and simplest to implement.)