I've been experimenting with differant string gages this weekend on my 4 and 5 string basses. I'm afraid my old, working hands are giving me some grief these days and I need to find strings that are either a lighter gage or of a less tension. My main question is concerning my 4 string bass because I haven't quite found the right combination. If you had a set of HEX CORE strings with gages of 40-60-80-100 compared to a ROUND CORE set with gages of 45-65-85-105, would the tension be about equal or the the same, generally speaking? If anyone knows for a fact I'd appreciate your expertise. I was thinking of trying either D'Addario's (Hex Core) @ 40-60-80-100, or some DR's (Round Core) @ 45-65-85-105. Thanks for your time.