Machining Advice Requested

[pugs]

What your doing looks fine. Some of the carbide insert tooling I use in the cnc turning center is shorter grooving bits and they are ground and supported to be able to turn to the right and left, where as standard groovers and cutoffs are only ground to plunge in. For hobby use though I would say what your doing is probably the fastest for the money as otherwise you'd be changing lots of tools or buying expensive ones.

[9W Monighan]

Looks fine to me. It looks like you could slide the tool closer to the holder to make it more rigid.

[tc1cat]

I agree with both pugs and 9W Monighan. Looks good so far. Roller looks great!