not to be mr practical or anything, but most trackies i know who don't race pursuit finals (most)- don't use a lockring at all.
they might as well be running a converted 80's road hub for all that matters.
because you're changing cogs a fair bit for different events, you just chainwhip one off, and spin the next one on. dealing with a bunch of allen bolts seems like a bit of a pain.
not to diss on level. i think they make a great product and hella support the messer scene.
however if you're planning to race a bit of track, the availability of cog sizes might play in, unless you've got deep pockets.
my 50 cents