i always grind off the pin tops with dremel, but as some said already, gotta get a chain tool. Used a few, the RK is much better than the motion pro imo. Without pressing the side plate on too much, see if you can slide the edge of the master link clip into the groove. (just the outer edge of the clip). Once it will slide into the groove, that's all ya need to press. Not pressing plate enough will have you f-ing up your clip if you try to slide it on, or , ruining o/x rings if pressed too much. wallowing the link holes out is changing your chain pitch size will prematurely wear the chain and/or sprockets (if you did that enough). no need for this, ever. and for those that think sticky chain lube is required for sealed chains... (all i use is wd40 after a ride), have ya noticed there ALWAYS grease (although darker now) on the master link pins when you remove the master link ? Sticky lubes just ruin sprockets and chains faster imo. I get 60 hrs or so out of a chain (and mine would still be used by some). I use 2 front sprockets or so for each chain .. riding 2+ hrs a day 4+ days a week in the FL sand/woods/roots. ONce the teeth start to slope a reasonable amount, put a new 13t on . Not too much mud, but we get some in national enduro and ya aren't taking care of the chain much between sections during these events.