I don't know about tips or advice but I'm loaded with opinions.

If you surf the posts enough you will find references to lots of scientific research about bicycle rider positioning. Most of those are based on Olympic or pro level athletes. If you think that's you, I'd try to mimic their conclusions. I consider myself to be an experiment of one. I don't claim that anything I say will apply to anybody else and I might change my own bike by the time you read this.

1. Handlebars 1" lower than the saddle is the absolute lowest that I will consider. Actually, my beater bike has handlebars a little above saddle height and it's the only diamond frame bike that I've ridden in almost 4 years.

2. After my broken hip healed I had a lot of issues with range-of-motion. I switched my recumbents to 148mm and 152mm cranks and immediately felt much more comfortable. I'm thinking that such short cranks will reduce the range of motion at your knee joint too. Not a cheap experiment, however.

3. Years ago I got a below-the-radar job at a local bike shop wrenching for bike parts. I earned more credits than I really needed so I ordered myself a Brooks saddle just so I could see what the big deal was. In short order I got 3 more. I had tried saddles with cut outs and grooves down the center but Brooks turned out to be the cure for "numb manhood" in my case.

4. In my case, the ultimate solution for hand numbness, neck and shoulder aches and the aforesaid numb manhood has been the "R" word. If you think there might be a recumbent in your future, you might think about saving yourself the cost of continuing to tweak your Revel 2 starting now. In the interest of full disclosure the things that I don't like about recumbents are that starts and stops are harder to do and it's harder to see cross traffic at intersections because I can't rotate my shoulders as easily. I much prefer a recumbent in open areas, not so much in town.