tsekh: I know that the cuts are different, I just want to experiment with another model I have never had. One friend of mine has those rigid 511s (although in size 32x32) and I like them. They look that they have higher rise and are different from another 511s I have ever seen, so I wanted to try them. I already contacted the seller and he gave me the measurements from size 36x34:
Thigh Width - Approximately 25cm (10")
Leg Opening - Approximately 20.5cm (8")
I also found some measurements here:
http://www.oipolloi.com/511-slim-classic-rigid-green
Rise: 12" (exactly the same as my both 501s (STF and preshrunk) in 36W)
Thigh: 10"
But thigh is really too slim, so I don't think that the 511s are for me. I need thigh width around 13". Nevermind, I just wanted to know some experience with them.
Btw, I have already looked at 501 - 47, 54, 66, but these are too expensive. $250 is really too much to experiement with. Also, it's not possible to buy them here in Europe.