I'd just be worried about getting the lock ring tight enough if you skid. You'd probably be able to tap the lockring to where it seems like it's tight enough, but if you pull back hard to skid and it's not 100% tight, you could potentially walk the cog an strip the hub body.
If you do do this, I'd lay off the skids until you get a proper lockring wrench on there. You'd be surprised how much more turn you can get out of those things when you think they're tight.
Like I said in my first post, it's best to use the proper tools.
I was actually taking the fixed cog off because I don't use it. If I
was going to put it back on and use it, I'd definitely invest in the right tools. God knows I won't be happy until I can't get my bike toolbox lid closed.
