AdivingBel
Diver
I had a similar issue when I switched from a standard back inflate (stiletto) to a basic harness express tech (basically a soft plate bp/w). I had been diving with 10#s. 8#s in the std. weight pockets and 2#s of tank trim on the upper cam band. I had worked this out over time with pretty good trim. I used this as a starting point with the new rig. Right away I had "floaty" feet and felt the need to over arch my back. I moved out to the sand (away from the reef), got neutral, and hovered perfectly still. As I expected I went a little head down, but surprisingly I turtled to one side (couldn't specify a side, it was dependent on the slight current). I did a weight check at the end of the dive, and found I was also a little heavy. I dropped the 2#s of trim weight on the next dive and was much improved. No floaty feet, no turtle (less air in the wing & all the wt. lower and to the front), and felt no need to arch my back to compensate. The point is even just a small movement or reduction of weight can make a huge difference. Good luck figuring it out.