I too have purchased a hydra cat, sail number 1108 “Thuggery”, about 18 months back, not much sailing last year though... but hoping to get out tomorrow :)
When I first got into sailing in the 80's, I was quite taken by Hydra Cats and just had to get one. The boat I brought was sail number 424 “Osprey”. It was a real experience; the first time I took it out, other sailors at the local club had to show me how to rig it!!
But as I learnt to sail and tune the boat, I became quite competitive in a mixed fleet of fifteen cats, regularly taking out the yardstick troph