Here's an odd one: I went to grab a couple of 70mm motor hooks from my stash and was surprised to see two different sizes: I'm not certain of the provenance of these two, but I can guess. The wider one looks to have had a finger tab cut off and filed down in the past, so I am guessing it came from an Estes kit. The narrower one must have come from an assortment of hooks I purchased quite a good long time ago. I only have one of the wide ones and a bunch of the narrow ones. What is completely unclear to me is whether I should be concerned about the strength of the narrower ones for 24mm motors? If I do, is there a source for the wider ones other than Estes? Neither BMS nor erockets.biz specifies the width of their hooks. A quick survey of my existing fleet of scratchbuilds shows only one with the narrower hook. I'm quite sure I didn't notice the difference when I built that one. I don't know how I acquired such a stock of the wider ones, maybe I did indeed by from Estes originally.