Skylark 4,
I used to have access to a Skylark 3 many years ago. Once trimmed out in a thermal you could let go of everything and eat your lunch - she went round as if on rails.
The only problem was rolling in and out as the rudder pedals were of the non-adjustable organ pedal type. Being a short-@rse my thermal entry technique was to slide down the cockpit to apply a bootful of rudder and the slide back up again which allowed me to bend my legs enough to permit the application of aileron. The reverse was necessary to roll level.
Happy days - particularly the summer of 1976. Still, flying around these days with L/Ds of around 50:1 does have its own attractions!