MMM V3 safe on 1717?

[fastbaja5b]

Have a 1717 in a 5T conversion, am looking at either 4s Lipo (High speed Idler) and geared for 30mph or 6s Lipo geared for 35-40mph but worried the stock esc wouldn't handle it, ripple current, MMM 6s = fire etc. Any thoughts? Should I go the MMM XL route? Is that esc safe now?

Did they ever find a way to stop the spark on connection thing? An inconvenience for some, but for ppl with an implantable defib or pacemaker, isn't it potentially hazardous? (or do we have to give up the hobby?)