Effectively, that would do the same thing as putting on the mtb riser bar you referred to earlier. Here's my suggestion: go back to the beginning. Let's assume you don't have issues with carpal tunnel, and that you are not 'death-gripping' the bars -- a common thing. If you are doing the latter, stop doing so and see if things improve. If not, then your first step should be to think about your fit on your bike. A simple test: ride around for a while then pedal in a straight line in your normal position and lift your hands just lightly/slightly off the bars. Do you feel yourself falling forward? If so, your fit on the bike is wrong, and this is putting excess weight on your hands.

Try, and then report back!