Do you have a link to the modification?
If you could easily do the 3 switch, then could you maybe do a 5 to 6 switch mod too. Like lets say if someone wanted 100%, 95%, 90%, 85% and 50%, then perhaps a wildcard, 97.5% setting?
The reason I ask, is so you could use the same charger for different chemsitries, or maybe different packs at different voltages. I've always been interested in that idea, the thought of the Satiator is great, but the cost is a lot.
--------------------------------------------
I have looked at these chargers on BMS Battery, their site says they can be used with Li-Ion, LiFePO4, and Lead Acid. From what I can tell, you specify the voltage you need when you order, which in turn narrows your chemistry. I like the C1000 unit for $69usd but the s/h is pretty expensive. I like your 3 voltage idea.
For sure, do a write up with a few pictures.... that would be great.