You're getting an 84 driver loop of RSLK for 15 bucks? And, getting 4 cord out of it before going dull?
The local Stihl dealer must have some sort of crush on you, and 4 cords of sterilized and washed Balsa, is hardly real world elsewhere.
If you can get away with it, and it works for you, congrats!
Around here loops of Stihl chain run about a buck a Bar inch, and at least touching up the cutters every tank fill is the rule, and often times touch ups are needed half through a single tank.
No way in hell would any production be possible, or financially feasable, using a new chain only once. Crap, folks would be wearing out bar nuts and screnches faster than Bars if we tried that around here.
I would be most interested in single use dull loops for 4 bucks though...:msp_w00t:
Stay safe!
Dingeryote