62g is a little heavier than 55g found in Brown/Blue/Red. It's for people who want light, but not as light as 55g. Also, it seems to be the most popular choice for ergo-clear mod.
The springs found in brown/blue/red are 60g bottom out force which is the chart that all the other korean springs go by.
Thus it's 2g heavier, which is the "perfect" amount.
Honestly, do people notice a gram or two difference when typing? Or is it just to have a weird, non-standard actuation that gives a placebo effect that you can tell a difference, while still being rare and cool?
I love the original MX Blue/Brown springs, but I miss something always. I have tried to fill that in my 50g~70g.
As You noticed, my 50g~70g work more like Vintage Black springs than MX Blue/Brown stocks.
I tried to add some more tightness and stability (these are a little bit missing in Blue/Browns, I may be drunken, but IMHO) to mines.
But sure they are Not perfect at all. might be better or worse Next time. I expect You Guys' harsh criticism.
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I may feel my girl gets 2kg heavier, 'cause I love her, always pay attention to her. (I guess, She weighs 80kg now.)