I did 2 diamonds in K6e and Skylark 4 in the UK. 300 triangle in the Skylark, so amazingly comfortable and roomy, a gentleman's machine. Trim in pitch the best,can fly hands off. K6e a disaster in this respect. Skylark 4 ailerons need some work, k6 a delight to fly, much easier for working the thermals, though the Skylark, once centered, allows you to eat your lunch. If you are a big chap I would go for the Skylark, especially if can be left in hangar with tips off. Airbrakes good on both, but skylark's are supreme, the best of any glider I have flown. Pete