Re: Reaching hooks for Spinnaker sheets?
Reaching hooks are commonly used on ILYA Scow (symmetrical) spinnaker class boats.
Such boats usually use the 'two sheet' (sans foreguys) spinnaker control line method. This arrangement is to control 'down' pressure' on the windward corner of the symm spinnaker using such small boat end-for-end gybing technique. Usually there is a reefing hook (or more commonly an open sheave) mounted to the base of the cap shrouds. To use, the twings are are pulled fully down and the foredeck crew simply puts the (now lazy) spinnaker sheet under the hook/sheeve). No need for 'foreguys' as the lazy sheet now becomes the foreguy when held by the 'hook' or sheave roller.
This is quite standard on M20 and I20 ILYA scows.