Perhaps I should have been more specific, but my point still stands - generally speaking, turbojet aircraft have comparatively little drag from windmilling engines. Certainly, the new generation high-bypass engines will have more drag than older engines, but everything is realitive. You only find the really big engines on really big airplanes... Having never flown a 757, 767, or 777, I can only guess what the power off glide ratio would be. I'm sure that there are some pilots here who would have that information, but I'm sure that it would be somewhere in the hight teens or 20's or maybe even higher - pretty amazing when you consider that some very successful glider designs are in the low 20's.
You hit the nail on the head when you made the comment about trying to center in the lift, that's why I could only get the Citation to climb along the ridge - no turning required.
I got my commercial add-on in Boulder City, NV in a 2-33 about 25 years ago and my CFI in a Blanick about 20 years ago. It was a lot of fun. Over the years I have owned a 2-33 and a 1-23. I did most of my instructing in 2-33s and Blanicks. I also served my time as a tow pilot, using a Bellanca Scout, a Super Cub, and a 150 HP Cessna 150.
As far as badges go, I've never really got into getting them. In our operation it was always such a pain in the rear to make all of the necessary arrangements "just in case" and it just never happened. I did manage several 5+ hour flights along a 50+ mile ridge. I've also had several flights to 17,000' (my 1-23 had an oxygen bottle) but ATC was never too keen about opening the window for us on short notice so I just kept below 18,000. (By the way, for years, a 1-23 held the altitude record of 47,000 some odd feet.) It wouldn't have been too difficult to just keep going as several of the guys in our soaring group did. One bit of advise, when you go to wave camp, get a good pair of electric socks and dress warm. It gets pretty frosty up there and you can't move around very much to keep the blood circulating.
I am currently gliderless, but one of these days I'm going to figure out a way to get some sort of motorglider. There are a couple of new ultralight designs, that if sucessful, could really be fun to own.