Hi,
I'm looking into buying a Jianken ATC spindle and they offer Taiwan Parfaite ISO20/ER16 tool holders as an option. Being Taiwanese I have confidence in the quality of the holders. The issue is in comparing the price of the Parfaite holders (US$108) to identical looking holders on ebay and aliexpress (as low as US$20). I think it would be fair to assume there is some difference in runout, balance as well as other things. Perhaps the cheaper ones are ok for roughing and the expensive ones best for finishing. Anyone had any experience with these?