I think I made about 87Km/hr which I guess is not that bad for the K13. I'd hope to go quicker in a K6CR or a K6E if we ever get them.
It wasn't a specially good day. I used the same weather as I used for the 1000Km over the same course (you do it all twice in the 1000) and the thermals were really spaced to suit an ASW22 so I had to pick my thermal very carefully and get there before it expired.
The K13 is painfully slow between thermals. At least the thermals were +5 when I got there. I used twenty six thermals on the trip. Twice I had to climb over 2000m and once 3000m to get back to a safe height. This kind of trip requires you to get high and stay high. Easy enough in glass but less so in older ships. The 1000Km was actually easier.
You should try it some time. I'll send you the fpl if you like. It wouldn't make a good hosted task as it is far too long. SWMBO was away on a trip so I spent all day on it.