Ottawa Ontario, friend. And yeah, the pics got corrupted a few server upgrades ago. I still have them, maybe ill go through and update them.
Your psu is simply better then a meanwell. I used meanwells to bulk charge at 100v, they output a continuous amperage at a voltage that you can pick, most have a range of 5-10 v up or down. I was aiming to not have to reconfigure any batteries when i charged. Unfortunately over time my batts became more and more out of balance and the 4 battery medics i was using to balance didn't work fast enough.
I eventually broke down and hot the Hyperion so i can charge 12 s. I have this huge westinghouse tripole switch, it is good up to 400v dc; it has three individual channels that are controlled by one large rocker switch. On channel turns power on to the outputs, and another connects/disconnects two seperate 48v 15 ah modules. When the switch is off, i can connect the charger to the modules using two plugs that turn the whole batt into one 48v30ah, which i can then charge on the hyperion. In the end i have one switch for everything,and the hyperion made all the difference. I am still effectively bulk charging but i never see balance problems.
The shunt could be two things. In every controller there will be a physical wire connection that limits the amps provided to the motor. By increasing or decreasing the resistance of this piece (adding wire/solder) you can change how many amps a stock non programmable controller will provide. So lots of people talk of "modifying' their shunt, they just mean wrapping some coper around it and soldering that on. This mod doesn't make any other part of the controller more heat resistant, so be careful.
The other "shunt" is in the CA; there are multiple models, but all of them need to monitor the amps somehow. Depending on your choice/system, the standard plug in CA has an internal one that requires calibrating, the stand-alone CA has an exterior shunt that you physically wire in. It is still just the measurement device either way.
I am fully in favor of the backpack idea; i don't think a crash that would initiate a lipo explosion would be survivable. I would eat a brick of lipo if you managed to live through an accident that triggered a fire and also couldn't take the backpack off and walk away from it. You always run the risk of penetrating you pack with a metal spike or something, but again, very unlikely, and lots of memebrs get away with basically taping the stuff to their bike, or mounting it inside a fiberglass enclosure which is just as easily penetrated in a crash. I still think the stuff is more dangerous when you charge it; even the hyperion could short when you're not looking, fuse open and start providing wall or psu current. Most members who get KFF get it when reconfiguring their pack for charge/discharge.
I just added a 203mm front disk and avid bb7 calipers to my front wheel. The stopping power is greatly increased. I highly reccomend a larger rotor if to anyone who can afford it.