I have a Sargent seat that kills me after a hundred miles or so...too hard. I'm seriously considering having a local upholsterer place a 2 cm gel pad in the seat. I've never ridden on a gel pad. For those that have, just wondering what your opinion on them are. Do they have a somewhat cushy feel, or more firm, or just softer with some degree of support? This would be about 200 bucks, considerably cheaper than a new seat. Any opinions would be appreciated.