Actually no, electrodes doesn't necessarily have a high degree of symmetry. They come in all size and shapes, and to make some molds you have to make several electrodes because it's not possible to machine the electrode in one piece.
Machining concave surfaces instead of flat surfaces...
I don't really see the cost to be the problem in making the cubes "pre-modded".
I see people talking about making fillets och rounding corners would make it cost more, and sure...in many cases it does take more time to machine. But cost of that extra work would be very small, and you often want...
Round 140 - One-Handed
Average - 28.94
Times
27.45, 32.23, 40.85, 28.08, 34.97, 29.38, 29.66, 27.79, 28.98, 25.25, 25.56, 20.83
On both the third and fifth solve I messed up the PLL making have to redo part of the cube.
I learned ZZ yesterday and actually got a couple of decent singles and average. 15.xx single and 18.xx avg5, I was thinking of using ZZ for OH. These times were 2H though. The inspection time still is a bit long though, but I don't care to much about that just yet.
If I were you I wouldn't rush with the OLL's. Take them slow instead. I don't think full OLL will do that much of a difference. I know about 30 of the algs, but I don't feel that I would have a big advantage in my times by knowing the rest of them.
You seem to lock up a bit when turning, practice turning more accurate. You also have to much pauses, take advantage of the slower TPS and lookahead. You seemed to do a lot of y-rotations and maybe even rotations in general. I find y-rotations to be one of the most awkward move OH, so try to...
D2 U2 B2 L U2 L U2 B2 R2 D2 U2 F D B2 L' U2 B L2 U' L'
Two move cross, three if you want to preserve an F2L pair as I did in my solution. OLL-skip. My time was 9.69, first sub-10 ever.
It's been a bad week for me being a few seconds above my average. But today I got pb's in both 3x3 and 3x3 OH. Average of 5 and 12. Feels good.
3x3
Avg5: 15.25
Avg12 16.02
3x3 OH
Avg5: 24.06
Avg12 25.93
Average of 12 OH was like 1.5-2 seconds improvement, just like that.