cool for sure. when i suspected a point, i just shoved it under the scope. perfect power and lighting. i do use a similar pocket scope when mass resharpening. the little on board led makes quick of tip inspections. i don't recal where i got mine. it was about 18 bucks & free shipping.
i made one shown by shaun hughes. they do work. and are very cheap to make compared to lindsay or grs. it's the old addage, "you get what you pay for". convenience/reliability, or inconvenience and maybe some problems.
i use a lot of wet/dry. when it loses efficiency, i still use it in the next step of sanding. i do enamelling on pendants and such. why would you sand the glass surface ? at least what i do comes out very smooth and needs no levelling.
super glue works for many tricky situations. two or three drops should work. when done, forget the torch. instead, soak the plate and block in acetone. it takes time, but works. a far better idea--- use hotmelt glue. available in most anny hardware outlet. when time to remove plate, isopropyl...