Sycamore - Exactly so. There were other add-ons, such as the 'Grabbit' hook and the short extension strap and. for anything over 60', the long strop (and then the later 'high line') Each had potential problems but personal experience made the underslung hook an absolute 'no-no' for human carriage.
Hoist problems (for the Whirlwind) stemmed, originally with 'bird-caging' ( wire strand separation caused by uneven cable laying). This we cleared with the introduction of the Lebus drum.
Ground and air testing of a limited number of other hoist manufacturers' products showed what improvements could be made, but (as ever) finance dictated the choice ... as with the RN Lynx. ! ! !