I emailed Groz, and got the same answer as Brmax, and comparing those suggestions to their needle suggestion chart for various uses, I don't see any leather recommended needle types listed under DBX1 or 1738A. Like Uwe astutely pointed out, this may be a fruitless uphill battle, though good sense isn't often used in my decision making. Needle type chart suggests D, DH, and LL type points, and none of these points seem to be a choice in these 2 needle systems. Am I missing something, or is that needle assessment correct?
https://www.thethreadexchange.com/miva/merchant.mvc?Screen=CTGY&Category_Code=NDL-DBx1
https://www.thethreadexchange.com/miva/merchant.mvc?Screen=CTGY&Category_Code=NDL-1738 A