It'll take a while, but it's not terribly hard. Basically, if you're only grooving one or two sets a year, that groover is fine. If you'll do much more than that, get a really good (read: insanely expensive) one.
Just get the tire out in the sun on a warm day, and make sure you have the balde in the right way: only one side is sharp.
I've grooved several sets of tires with that groover. It's ok. Hell it's onlt like $60. It will do the job, but slow. Our club just got a new groover. Don't remember what the name of it is but ir an about $350. So it's pretty much the cat's azz:flipoff2:
If you get it at least make sure that the tires are not cold to the touch because it makes them 10x easier to groove if they're warm. Take your time when you do it and make sure that the head of the groover is pre-heating what you are getting ready to cut.
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