i have not used the TIN coated tooling from LMS,
but, if it's anything like the TIN coated stuff from HF, i'd throw it in the garbage and try a USA made endmill or a European made endmill (Germany,Poland,Austria,Switzerland,Sweden,Italy etc all make finer tooling)
i really don't like to use very inexpensive tools and tooling.
for me it does 2 counterproductive things
1, wasting time changing out inferior broken tooling
2, aggravation, after taking the time to do a proper set up fouling a piece of work that is nearly completed because i wanted to save a couple bucks on some cheap tooling.
after i set up, i want to complete the operations until it is necessary to change tooling for other operations.
good tooling can be broken too, i can attest to that.
i do believe that better materials + better tooling = superior work