repetitive stress injuries/ power to weight ratios

[micfly420]

does anyone know if there are any test results or papers on repetitive stress injuries from cordless hand drills out there ? I have 2 products a Dewalt dw 997 and a dw 989. they are the same drill as far as power and weight yet the 989 has 2 handles and the 997 is a single handeled drill. My contention is that the 997 which came out first should have had a second handle to save the user the risk of a repetitive stress injury Black and Decker / dewalt say they've never heard of this problem or any test stating this fact which i find odd that there is no R&D on this or any standards regaurding this problem. Thanx

[MargeB]

Aren't you more at risk of white finger from drills?