Been running the 1st model myself, never had a problem, and no, I don't use the OEM adjuster bolts, just the bolts that I got from Gilles (just like rorlow), which I Loctite'd. I'll go as far as saying that I don't even use the pieces that are suppose to clamp at the end of the swingarm, cause it was a PITA for me to put on.
And for the ease of adjusting your chain, they pay for themselves. For the longest time I would run different wheels between the street and the track, but with my choice of street tires only going up to 190/50, it meant I always had to move the axle blocks to compensate between that and my 190/55 race DOTs. The Gilles adjusters make it such a breeze to just take an allen wrench (which every motorcyclist should have on hand anyway!) and adjust as needed.