Lock and Load: The Reassembled Machinist Guide

[Komoritane]

Also, has it been mentioned at all that it seems like MCH has a minimum SPD value where everything aligns really tight like DRG?

Outof Names guide mentions that the openers should be doable with 475+ skill speed.

Aiurily's MCH FAQ has some skill speed threshold information as well:
http://www.tinyurl.com/aiurilyfaq
"the rotation flows more fluidly and comfortably (imo) at either below 460 sksp or 704+ sksp. i consider anything in between to be a bit awkward. in the end, these are not huge deal breaking thresholds; you should still prioritize maximizing crit and det."

If you look at gear for most top MCH in lodestone, they're usually sitting at around 500-something skill speed.