Maybe I'm not mechanically inclined, but I needed to replace a V1 axle (which was 'walking' and causing headaches) with a V2 axle. Figured it would be a good time, too, to completely strip, clean and lubricate the drive.
Man, getting the chains and idler cable back on is a bear. First, there's no room to really get a wrench on the nylock nuts and you have to pinch the cable just behind the nut with needlenose pliers, or something, and you turn the nut 1/8th turn by 1/8th turn...
Then, it seems like there's zero slack -- either the front chain goes on, but the rear chain can't, or vice versa. And, while wrestling with this, the drive flops around, opens, closes...it's like trying to tattoo an octopus.
Just venting. I'm sure there's a secret I'm missing.