Hi Barry
Without getting too technical, i have a 1994 4/4 which i have owned for 10 + years. I have suffered the opposite symptoms to you, bottoming out on both front and rear suspension on all UK roads. Over last winter i played about with the suspension settings. I opted for adjustable Koni's, however as the other posts note there are several options to achieve the desired ride. I fitted Koni's stiffened the rear by one turn and left the front as supplied.
Whilst i cured the rear bottoming out, even when fully loaded, i introduced substantial understeer. I have since addressed this by softening the front suspension.
So it's worth noting that if you change your suspension and play about with adjustable shocks, you may materially affect the handling.
Koni have a good website that explains how to adjust their shocks
After 10 years of poor ride quality, the Koni's have made it ying yangs better.
Good Luck
